TGraphPolar Class Reference

To draw a polar graph.

TGraphPolar creates a polar graph (including error bars). A TGraphPolar is a TGraphErrors represented in polar coordinates. It uses the class TGraphPolargram to draw the polar axis.

Example:

{
   TCanvas * CPol = new TCanvas("CPol","TGraphPolar Example",500,500);
 
   Double_t theta[8];
   Double_t radius[8];
   Double_t etheta[8];
   Double_t eradius[8];
 
   for (int i=0; i<8; i++) {
      theta[i]   = (i+1)*(TMath::Pi()/4.);
      radius[i]  = (i+1)*0.05;
      etheta[i]  = TMath::Pi()/8.;
      eradius[i] = 0.05;
   }
 
   TGraphPolar * grP1 = new TGraphPolar(8, theta, radius, etheta, eradius);
   grP1->SetTitle("TGraphPolar Example");
 
   grP1->SetMarkerStyle(20);
   grP1->SetMarkerSize(2.);
   grP1->SetMarkerColor(4);
   grP1->SetLineColor(2);
   grP1->SetLineWidth(3);
   grP1->Draw("PE");
 
   // Update, otherwise GetPolargram returns 0
   CPol->Update();
   grP1->GetPolargram()->SetToRadian();
 
   return CPol;
}

Definition at line 23 of file TGraphPolar.h.

Public Types
enum	{   kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 ,   kBitMask = 0x00ffffff }
enum	{ kSingleKey = (1ULL << ( 0 )) , kOverwrite = (1ULL << ( 1 )) , kWriteDelete = (1ULL << ( 2 )) }
enum	EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) }
enum	EStatusBits {   kNoStats = (1ULL << ( 9 )) , kClipFrame = (1ULL << ( 10 )) , kResetHisto = (1ULL << ( 17 )) , kNotEditable = (1ULL << ( 18 )) ,   kIsSortedX = (1ULL << ( 19 )) , kIsHighlight = (1ULL << ( 20 )) }

Public Member Functions
	TGraphPolar ()
	TGraphPolar default constructor.
	TGraphPolar (Int_t n, const Double_t *theta=nullptr, const Double_t *r=nullptr, const Double_t *etheta=nullptr, const Double_t *er=nullptr)
	TGraphPolar constructor.
	~TGraphPolar () override
	TGraphPolar destructor.
void	AbstractMethod (const char *method) const
	Call this function within a function that you don't want to define as purely virtual, in order not to force all users deriving from that class to implement that maybe (on their side) unused function; but at the same time, emit a run-time warning if they try to call it, telling that it is not implemented in the derived class: action must thus be taken on the user side to override it.
virtual void	Add (TF1 *f, Double_t c1=1)
	Performs the operation: y = y + c1*f(x,y) Errors are not recalculated.
virtual void	AddPoint (Double_t x, Double_t y)
	Append a new point to the graph.
virtual void	AddPointError (Double_t x, Double_t y, Double_t ex=0., Double_t ey=0.)
	Add a point with errorbars to the graph.
virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad.
void	Apply (TF1 *f) override
	Apply function to all the data points \( y = f(x,y) \).
virtual void	ApplyX (TF1 *f)
	Apply function to all the data points \( x = f(x,y) \).
void	Browse (TBrowser *b) override
	Browse.
ULong_t	CheckedHash ()
	Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.
virtual Double_t	Chisquare (TF1 *f1, Option_t *option="") const
	Return the chisquare of this graph with respect to f1.
virtual const char *	ClassName () const
	Returns name of class to which the object belongs.
void	Clear (Option_t *option="") override
	Set name and title to empty strings ("").
TObject *	Clone (const char *newname="") const override
	Make a clone of an object using the Streamer facility.
Int_t	Compare (const TObject *obj) const override
	Compare two TNamed objects.
void	ComputeRange (Double_t &xmin, Double_t &ymin, Double_t &xmax, Double_t &ymax) const override
	Compute range.
void	Copy (TAttFill &attfill) const
	Copy this fill attributes to a new TAttFill.
void	Copy (TAttLine &attline) const
	Copy this line attributes to a new TAttLine.
void	Copy (TAttMarker &attmarker) const
	Copy this marker attributes to a new TAttMarker.
void	Copy (TObject &named) const override
	Copy this to obj.
TGraphPolargram *	CreatePolargram (const char *opt)
	Create polargram object for given draw options.
virtual void	Delete (Option_t *option="")
	Delete this object.
Int_t	DistancetoLine (Int_t px, Int_t py, Double_t xp1, Double_t yp1, Double_t xp2, Double_t yp2)
	Compute distance from point px,py to a line.
Int_t	DistancetoPrimitive (Int_t px, Int_t py) override
	Compute distance from point px,py to a graph.
void	Draw (Option_t *options="") override
	Draw TGraphPolar.
virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs.
virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1).
virtual void	DrawGraph (Int_t n, const Double_t *x=nullptr, const Double_t *y=nullptr, Option_t *option="")
	Draw this graph with new attributes.
virtual void	DrawGraph (Int_t n, const Float_t *x, const Float_t *y, Option_t *option="")
	Draw this graph with new attributes.
virtual void	DrawGraph (Int_t n, const Int_t *x, const Int_t *y, Option_t *option="")
	Draw this graph with new attributes.
virtual void	DrawPanel ()
	Display a panel with all graph drawing options.
virtual void	Dump () const
	Dump contents of object on stdout.
virtual void	Error (const char *method, const char *msgfmt,...) const
	Issue error message.
virtual Double_t	Eval (Double_t x, TSpline *spline=nullptr, Option_t *option="") const
	Interpolate points in this graph at x using a TSpline.
virtual void	Execute (const char *method, const char *params, Int_t *error=nullptr)
	Execute method on this object with the given parameter string, e.g.
virtual void	Execute (TMethod *method, TObjArray *params, Int_t *error=nullptr)
	Execute method on this object with parameters stored in the TObjArray.
void	ExecuteEvent (Int_t event, Int_t px, Int_t py) override
	Execute action corresponding to one event.
virtual void	Expand (Int_t newsize)
	If array sizes <= newsize, expand storage to 2*newsize.
virtual void	Expand (Int_t newsize, Int_t step)
	If graph capacity is less than newsize points then make array sizes equal to least multiple of step to contain newsize points.
virtual void	Fatal (const char *method, const char *msgfmt,...) const
	Issue fatal error message.
virtual void	FillBuffer (char *&buffer)
	Encode TNamed into output buffer.
TObject *	FindObject (const char *name) const override
	Search object named name in the list of functions.
TObject *	FindObject (const TObject *obj) const override
	Search object obj in the list of functions.
virtual TFitResultPtr	Fit (const char *formula, Option_t *option="", Option_t *goption="", Axis_t xmin=0, Axis_t xmax=0)
	Fit this graph with the global function named fname.
virtual TFitResultPtr	Fit (TF1 *f1, Option_t *option="", Option_t *goption="", Axis_t xmin=0, Axis_t xmax=0)
	Fit this graph with function f1.
virtual void	FitPanel ()
	Display a GUI panel with all graph fit options.
virtual Double_t	GetCorrelationFactor () const
	Return graph correlation factor.
virtual Double_t	GetCovariance () const
	Return covariance of vectors x,y.
virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object.
Bool_t	GetEditable () const
	Return kTRUE if kNotEditable bit is not set, kFALSE otherwise.
Double_t	GetErrorX (Int_t bin) const override
	It returns the error along X at point i.
Double_t	GetErrorXhigh (Int_t bin) const override
	It returns the error along X at point i.
Double_t	GetErrorXlow (Int_t bin) const override
	It returns the error along X at point i.
Double_t	GetErrorY (Int_t bin) const override
	It returns the error along Y at point i.
Double_t	GetErrorYhigh (Int_t bin) const override
	It returns the error along Y at point i.
Double_t	GetErrorYlow (Int_t bin) const override
	It returns the error along Y at point i.
Double_t *	GetEX () const override
virtual Double_t *	GetEXhigh () const
virtual Double_t *	GetEXhighd () const
virtual Double_t *	GetEXlow () const
virtual Double_t *	GetEXlowd () const
Double_t *	GetEY () const override
virtual Double_t *	GetEYhigh () const
virtual Double_t *	GetEYhighd () const
virtual Double_t *	GetEYlow () const
virtual Double_t *	GetEYlowd () const
virtual Color_t	GetFillColor () const
	Return the fill area color.
virtual Style_t	GetFillStyle () const
	Return the fill area style.
TF1 *	GetFunction (const char *name) const
	Return pointer to function with name.
virtual TH1F *	GetHistogram () const
	Returns a pointer to the histogram used to draw the axis Takes into account the two following cases.
virtual const char *	GetIconName () const
	Returns mime type name of object.
virtual Color_t	GetLineColor () const
	Return the line color.
virtual Style_t	GetLineStyle () const
	Return the line style.
virtual Width_t	GetLineWidth () const
	Return the line width.
TList *	GetListOfFunctions () const
virtual Color_t	GetMarkerColor () const
	Return the marker color.
virtual Size_t	GetMarkerSize () const
	Return the marker size.
virtual Style_t	GetMarkerStyle () const
	Return the marker style.
Double_t	GetMaximum () const
Int_t	GetMaxSize () const
virtual Double_t	GetMean (Int_t axis=1) const
	Return mean value of X (axis=1) or Y (axis=2)
Double_t	GetMinimum () const
Int_t	GetN () const
const char *	GetName () const override
	Returns name of object.
char *	GetObjectInfo (Int_t px, Int_t py) const override
	Implementation to get information on point of graph at cursor position Adapted from class TH1.
virtual Option_t *	GetOption () const
Bool_t	GetOptionAxis ()
virtual Int_t	GetPoint (Int_t i, Double_t &x, Double_t &y) const
	Get x and y values for point number i.
virtual Double_t	GetPointX (Int_t i) const
	Get x value for point i.
virtual Double_t	GetPointY (Int_t i) const
	Get y value for point i.
TGraphPolargram *	GetPolargram ()
virtual Double_t	GetRMS (Int_t axis=1) const
	Return RMS of X (axis=1) or Y (axis=2)
const char *	GetTitle () const override
	Returns title of object.
virtual UInt_t	GetUniqueID () const
	Return the unique object id.
Double_t *	GetX () const
TAxis *	GetXaxis () const
	Get x axis of the graph.
Double_t *	GetXpol ()
	Return points in polar coordinates.
Double_t *	GetY () const
TAxis *	GetYaxis () const
	Get y axis of the graph.
Double_t *	GetYpol ()
	Return points in polar coordinates.
virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out.
ULong_t	Hash () const override
	Return hash value for this object.
Bool_t	HasInconsistentHash () const
	Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.
virtual void	Info (const char *method, const char *msgfmt,...) const
	Issue info message.
virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname".
virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl.
virtual void	InitExpo (Double_t xmin=0, Double_t xmax=0)
	Compute Initial values of parameters for an exponential.
virtual void	InitGaus (Double_t xmin=0, Double_t xmax=0)
	Compute Initial values of parameters for a gaussian.
virtual void	InitPolynom (Double_t xmin=0, Double_t xmax=0)
	Compute Initial values of parameters for a polynom.
virtual Int_t	InsertPoint ()
	Insert a new point at the mouse position.
virtual void	InsertPointBefore (Int_t ipoint, Double_t x, Double_t y)
	Insert a new point with coordinates (x,y) before the point number ipoint.
virtual void	Inspect () const
	Dump contents of this object in a graphics canvas.
virtual Double_t	Integral (Int_t first=0, Int_t last=-1) const
	Integrate the TGraph data within a given (index) range.
void	InvertBit (UInt_t f)
TClass *	IsA () const override
Bool_t	IsDestructed () const
	IsDestructed.
virtual Bool_t	IsEditable () const
virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory).
virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).
virtual Bool_t	IsHighlight () const
virtual Int_t	IsInside (Double_t x, Double_t y) const
	Return 1 if the point (x,y) is inside the polygon defined by the graph vertices 0 otherwise.
R__ALWAYS_INLINE Bool_t	IsOnHeap () const
Bool_t	IsSortable () const override
virtual Bool_t	IsTransparent () const
R__ALWAYS_INLINE Bool_t	IsZombie () const
virtual void	LeastSquareFit (Int_t m, Double_t *a, Double_t xmin=0, Double_t xmax=0)
	Least squares polynomial fitting without weights.
virtual void	LeastSquareLinearFit (Int_t n, Double_t &a0, Double_t &a1, Int_t &ifail, Double_t xmin=0, Double_t xmax=0)
	Least square linear fit without weights.
void	ls (Option_t *option="") const override
	List TNamed name and title.
void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).
Int_t	Merge (TCollection *list) override
	Adds all graphs with errors from the collection to this graph.
virtual void	Modify ()
	Change current fill area attributes if necessary.
virtual void	Modify ()
	Change current line attributes if necessary.
virtual void	Modify ()
	Change current marker attributes if necessary.
virtual void	ModifyOn (TVirtualPad &pad)
	Change current fill area attributes on speicifed pad.
virtual void	ModifyOn (TVirtualPad &pad)
	Change current line attributes on specified pad.
virtual void	ModifyOn (TVirtualPad &pad)
	Change current marker attributes if necessary on specified pad.
virtual void	MovePoints (Double_t dx, Double_t dy, Bool_t logx=kFALSE, Bool_t logy=kFALSE)
	Move all graph points on specified values dx,dy If log argument specified, calculation done in logarithmic scale like: new_value = exp( log(old_value) + delta );.
virtual Bool_t	Notify ()
	This method must be overridden to handle object notification (the base implementation is no-op).
void	Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete.
void	operator delete (void *, size_t)
	Operator delete for sized deallocation.
void	operator delete (void *ptr)
	Operator delete.
void	operator delete (void *ptr, void *vp)
	Only called by placement new when throwing an exception.
void	operator delete[] (void *, size_t)
	Operator delete [] for sized deallocation.
void	operator delete[] (void *ptr)
	Operator delete [].
void	operator delete[] (void *ptr, void *vp)
	Only called by placement new[] when throwing an exception.
void *	operator new (size_t sz)
void *	operator new (size_t sz, void *vp)
void *	operator new[] (size_t sz)
void *	operator new[] (size_t sz, void *vp)
void	Paint (Option_t *chopt="") override
	Draw this graph with its current attributes.
void	PaintGraph (Int_t npoints, const Double_t *x, const Double_t *y, Option_t *chopt)
	Draw the (x,y) as a graph.
void	PaintGrapHist (Int_t npoints, const Double_t *x, const Double_t *y, Option_t *chopt)
	Draw the (x,y) as a histogram.
virtual void	PaintStats (TF1 *fit)
	Draw the stats.
virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list.
void	Print (Option_t *chopt="") const override
	Print graph and errors values.
virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory.
void	RecursiveRemove (TObject *obj) override
	Recursively remove object from the list of functions.
virtual Int_t	RemovePoint ()
	Delete point close to the mouse position Returns index of removed point (or -1 if nothing was changed)
virtual Int_t	RemovePoint (Int_t ipoint)
	Delete point number ipoint Returns index of removed point (or -1 if nothing was changed)
virtual void	ResetAttFill (Option_t *option="")
	Reset this fill attributes to default values.
virtual void	ResetAttLine (Option_t *option="")
	Reset this line attributes to default values.
virtual void	ResetAttMarker (Option_t *toption="")
	Reset this marker attributes to the default values.
void	ResetBit (UInt_t f)
void	SaveAs (const char *filename="graph", Option_t *option="") const override
	Save the graph as .csv, .tsv or .txt.
virtual void	SaveFillAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1001)
	Save fill attributes as C++ statement(s) on output stream out.
virtual void	SaveLineAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t widdef=1)
	Save line attributes as C++ statement(s) on output stream out.
virtual void	SaveMarkerAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t sizdef=1)
	Save line attributes as C++ statement(s) on output stream out.
void	SavePrimitive (std::ostream &out, Option_t *option="") override
	Save primitive as a C++ statement(s) on output stream out.
void	Scale (Double_t c1=1., Option_t *option="y") override
	Multiply the values and errors of a TGraphErrors by a constant c1.
virtual void	Set (Int_t n)
	Set number of points in the graph Existing coordinates are preserved New coordinates above fNpoints are preset to 0.
void	SetBit (UInt_t f)
void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f.
virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object.
virtual void	SetEditable (Bool_t editable=kTRUE)
	if editable=kFALSE, the graph cannot be modified with the mouse by default a TGraph is editable
virtual void	SetFillAttributes ()
	Invoke the DialogCanvas Fill attributes.
virtual void	SetFillColor (Color_t fcolor)
	Set the fill area color.
void	SetFillColor (TColorNumber)
	Set a fill color.
virtual void	SetFillColorAlpha (Color_t fcolor, Float_t falpha)
	Set a transparent fill color.
virtual void	SetFillStyle (Style_t fstyle)
	Set the fill area style.
virtual void	SetHighlight (Bool_t set=kTRUE)
	Set highlight (enable/disable) mode for the graph by default highlight mode is disable.
virtual void	SetHistogram (TH1F *h)
	Set the histogram underlying the TGraph. This transfers the ownership of h to the TGraph. The preexisting fHistogram will be deleted.
virtual void	SetLineAttributes ()
	Invoke the DialogCanvas Line attributes.
virtual void	SetLineColor (Color_t lcolor)
	Set the line color.
void	SetLineColor (TColorNumber lcolor)
virtual void	SetLineColorAlpha (Color_t lcolor, Float_t lalpha)
	Set a transparent line color.
virtual void	SetLineStyle (Style_t lstyle)
	Set the line style.
virtual void	SetLineWidth (Width_t lwidth)
	Set the line width.
virtual void	SetMarkerAttributes ()
	Invoke the DialogCanvas Marker attributes.
virtual void	SetMarkerColor (Color_t mcolor=1)
	Set the marker color.
void	SetMarkerColor (TColorNumber lcolor)
virtual void	SetMarkerColorAlpha (Color_t mcolor, Float_t malpha)
	Set a transparent marker color.
virtual void	SetMarkerSize (Size_t msize=1)
	Set the marker size.
virtual void	SetMarkerStyle (Style_t mstyle=1)
	Set the marker style.
void	SetMaximum (Double_t maximum=1) override
	Set the maximum of the graph.
void	SetMaxPolar (Double_t maximum=6.28318530717958623)
	Set maximum Polar.
void	SetMaxRadial (Double_t maximum=1)
	Set maximum radial at the intersection of the positive X axis part and the circle.
void	SetMinimum (Double_t minimum=0) override
	Set the minimum of the graph.
void	SetMinPolar (Double_t minimum=0)
	Set minimum Polar.
void	SetMinRadial (Double_t minimum=0)
	Set minimum radial in the center of the circle.
void	SetName (const char *name="") override
	Set graph name.
void	SetNameTitle (const char *name="", const char *title="") override
	Set graph name and title.
virtual void	SetOption (Option_t *option=" ")
void	SetOptionAxis (Bool_t opt)
virtual void	SetPoint (Int_t i, Double_t x, Double_t y)
	Set x and y values for point number i.
virtual void	SetPointError (Double_t ex, Double_t ey)
	Set ex and ey values for point pointed by the mouse.
virtual void	SetPointError (Int_t i, Double_t ex, Double_t ey)
	Set ex and ey values for point number i.
virtual void	SetPointX (Int_t i, Double_t x)
	Set x value for point i.
virtual void	SetPointY (Int_t i, Double_t y)
	Set y value for point i.
void	SetPolargram (TGraphPolargram *p)
virtual void	SetStats (Bool_t stats=kTRUE)
	Set statistics option on/off.
void	SetTitle (const char *title="") override
	Change (i.e.
virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id.
virtual Int_t	Sizeof () const
	Return size of the TNamed part of the TObject.
virtual void	Sort (Bool_t(*greater)(const TGraph *, Int_t, Int_t)=&TGraph::CompareX, Bool_t ascending=kTRUE, Int_t low=0, Int_t high=-1111)
	Sorts the points of this TGraph using in-place quicksort (see e.g.
void	Streamer (TBuffer &) override
	Stream an object of class TGraphErrors.
void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
virtual void	SysError (const char *method, const char *msgfmt,...) const
	Issue system error message.
R__ALWAYS_INLINE Bool_t	TestBit (UInt_t f) const
Int_t	TestBits (UInt_t f) const
void	UseCurrentStyle () override
	Set current style settings in this graph This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.
virtual void	Warning (const char *method, const char *msgfmt,...) const
	Issue warning message.
virtual Int_t	Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.
virtual Int_t	Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory.
void	Zero (Int_t &k, Double_t AZ, Double_t BZ, Double_t E2, Double_t &X, Double_t &Y, Int_t maxiterations)
	Find zero of a continuous function.

Static Public Member Functions
static Int_t	CalculateScanfFields (const char *fmt)
	Calculate scan fields.
static TClass *	Class ()
static const char *	Class_Name ()
static constexpr Version_t	Class_Version ()
static Bool_t	CompareArg (const TGraph *gr, Int_t left, Int_t right)
	Return kTRUE if point number "left"'s argument (angle with respect to positive x-axis) is bigger than that of point number "right".
static Bool_t	CompareRadius (const TGraph *gr, Int_t left, Int_t right)
	Return kTRUE if point number "left"'s distance to origin is bigger than that of point number "right".
static Bool_t	CompareX (const TGraph *gr, Int_t left, Int_t right)
	Return kTRUE if fX[left] > fX[right]. Can be used by Sort.
static Bool_t	CompareY (const TGraph *gr, Int_t left, Int_t right)
	Return kTRUE if fY[left] > fY[right]. Can be used by Sort.
static const char *	DeclFileName ()
static Longptr_t	GetDtorOnly ()
	Return destructor only flag.
static Width_t	GetMarkerLineWidth (Style_t style)
	Internal helper function that returns the line width of the given marker style (0 = filled marker)
static Style_t	GetMarkerStyleBase (Style_t style)
	Internal helper function that returns the corresponding marker style with line width 1 for the given style.
static Bool_t	GetObjectStat ()
	Get status of object stat flag.
static void	SetDtorOnly (void *obj)
	Set destructor only flag.
static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable.

Protected Types
enum	{ kOnlyPrepStep = (1ULL << ( 3 )) }

Protected Member Functions
Double_t **	Allocate (Int_t size) override
	Allocate internal data structures for newsize points.
Double_t **	AllocateArrays (Int_t Narrays, Int_t arraySize)
	Allocate arrays.
void	CopyAndRelease (Double_t **newarrays, Int_t ibegin, Int_t iend, Int_t obegin) override
	Copy and release.
Bool_t	CopyPoints (Double_t **arrays, Int_t ibegin, Int_t iend, Int_t obegin) override
	Copy errors from fEX and fEY to arrays[0] and arrays[1] or to fEX and fEY if arrays == 0 and ibegin != iend.
Bool_t	CtorAllocate ()
	Constructor allocate.
virtual void	DoError (int level, const char *location, const char *fmt, va_list va) const
	Interface to ErrorHandler (protected).
Bool_t	DoMerge (const TGraph *g) override
	Protected function to perform the merge operation of a graph with errors.
Double_t **	ExpandAndCopy (Int_t size, Int_t iend)
	if size > fMaxSize allocate new arrays of 2*size points and copy iend first points.
void	FillZero (Int_t begin, Int_t end, Bool_t from_ctor=kTRUE) override
	Set zero values for point arrays in the range [begin, end].
void	MakeZombie ()
void	SaveHistogramAndFunctions (std::ostream &out, const char *varname, Option_t *option)
	Save histogram and list of functions of TGraph as C++ statement Used in all TGraph-derived classes.
void	SavePrimitiveNameTitle (std::ostream &out, const char *variable_name)
	Save object name and title into the output stream "out".
Double_t **	ShrinkAndCopy (Int_t size, Int_t iend)
	if size*2 <= fMaxSize allocate new arrays of size points, copy points [0,oend).
void	SwapPoints (Int_t pos1, Int_t pos2) override
	Swap points.
void	UpdateArrays (const std::vector< Int_t > &sorting_indices, Int_t numSortedPoints, Int_t low) override
	Update the fX, fY, fEX, and fEY arrays with the sorted values.

Static Protected Member Functions
static void	SavePrimitiveConstructor (std::ostream &out, TClass *cl, const char *variable_name, const char *constructor_agrs="", Bool_t empty_line=kTRUE)
	Save object constructor in the output stream "out".
static void	SavePrimitiveDraw (std::ostream &out, const char *variable_name, Option_t *option=nullptr)
	Save invocation of primitive Draw() method Skipped if option contains "nodraw" string.
static TString	SavePrimitiveVector (std::ostream &out, const char *prefix, Int_t len, Double_t *arr, Int_t flag=0)
	Save array in the output stream "out" as vector.
static void	SwapValues (Double_t *arr, Int_t pos1, Int_t pos2)
	Swap values.

Protected Attributes
Double_t *	fEX {nullptr}
	[fNpoints] array of X errors
Double_t *	fEY {nullptr}
	[fNpoints] array of Y errors
Color_t	fFillColor
	Fill area color.
Style_t	fFillStyle
	Fill area style.
TList *	fFunctions
	Pointer to list of functions (fits and user)
TH1F *	fHistogram
	Pointer to histogram used for drawing axis.
Color_t	fLineColor
	Line color.
Style_t	fLineStyle
	Line style.
Width_t	fLineWidth
	Line width.
Color_t	fMarkerColor
	Marker color.
Size_t	fMarkerSize
	Marker size.
Style_t	fMarkerStyle
	Marker style.
Double_t	fMaximum
	Maximum value for plotting along y.
Int_t	fMaxSize
	!Current dimension of arrays fX and fY
Double_t	fMinimum
	Minimum value for plotting along y.
TString	fName
Int_t	fNpoints
	Number of points <= fMaxSize.
TString	fOption
	Options used for drawing the graph.
TGraphPolargram *	fPolargram
	The polar coordinates system.
TString	fTitle
Double_t *	fX
	[fNpoints] array of X points
Double_t *	fXpol
	[fNpoints] points in polar coordinates
Double_t *	fY
	[fNpoints] array of Y points
Double_t *	fYpol
	[fNpoints] points in polar coordinates

Static Private Member Functions
static void	AddToTObjectTable (TObject *)
	Private helper function which will dispatch to TObjectTable::AddObj.

Private Attributes
UInt_t	fBits
	bit field status word
Bool_t	fOptionAxis
	Force drawing of new coord system.
UInt_t	fUniqueID
	object unique identifier

Static Private Attributes
static Longptr_t	fgDtorOnly = 0
	object for which to call dtor only (i.e. no delete)
static Bool_t	fgObjectStat = kTRUE
	if true keep track of objects in TObjectTable

#include <TGraphPolar.h>

Inheritance diagram for TGraphPolar:

Member Enumeration Documentation

anonymous enum

anonymous enum

inherited

Enumerator
kIsOnHeap	object is on heap
kNotDeleted	object has not been deleted
kZombie	object ctor failed
kInconsistent	class overload Hash but does call RecursiveRemove in destructor
kBitMask

Definition at line 89 of file TObject.h.

anonymous enum

anonymous enum

inherited

Enumerator
kSingleKey	write collection with single key
kOverwrite	overwrite existing object with same name
kWriteDelete	write object, then delete previous key with same name

Definition at line 99 of file TObject.h.

anonymous enum

anonymous enum

protectedinherited

Enumerator

kOnlyPrepStep

Used to request that the class specific implementation of TObject::Write just prepare the objects to be ready to be written but do not actually write them into the TBuffer. This is just for example by TBufferMerger to request that the TTree inside the file calls TTree::FlushBaskets (outside of the merging lock) and TBufferMerger will later ask for the write (inside the merging lock). To take advantage of this feature the class needs to overload TObject::Write and use this enum value accordingly. (See TTree::Write and TObject::Write) Do not use, this feature will be migrate to the Merge function (See TClass and TTree::Merge)

Definition at line 106 of file TObject.h.

EDeprecatedStatusBits

enum TObject::EDeprecatedStatusBits

inherited

Enumerator
kObjInCanvas	for backward compatibility only, use kMustCleanup

Definition at line 84 of file TObject.h.

EStatusBits

enum TGraph::EStatusBits

inherited

Enumerator
kNoStats	Don't draw stats box.
kClipFrame	Clip to the frame boundary.
kResetHisto	fHistogram must be reset in GetHistogram
kNotEditable	Bit set if graph is non editable.
kIsSortedX	Graph is sorted in X points.
kIsHighlight	Bit set if graph is highlight.

Definition at line 73 of file TGraph.h.

Constructor & Destructor Documentation

TGraphPolar() [1/2]

TGraphPolar::TGraphPolar

(

)

TGraphPolar default constructor.

Definition at line 65 of file TGraphPolar.cxx.

TGraphPolar() [2/2]

TGraphPolar::TGraphPolar	(	Int_t	n,
		const Double_t *	theta = nullptr,
		const Double_t *	r = nullptr,
		const Double_t *	etheta = nullptr,
		const Double_t *	er = nullptr )

TGraphPolar constructor.

Parameters

[in]	n	number of points.
[in]	theta	angular values.
[in]	r	radial values.
[in]	etheta	errors on angular values.
[in]	er	errors on radial values.

Definition at line 79 of file TGraphPolar.cxx.

~TGraphPolar()

TGraphPolar::~TGraphPolar ( )

override

TGraphPolar destructor.

Definition at line 90 of file TGraphPolar.cxx.

Member Function Documentation

AbstractMethod()

void TObject::AbstractMethod ( const char * method ) const

inherited

Call this function within a function that you don't want to define as purely virtual, in order not to force all users deriving from that class to implement that maybe (on their side) unused function; but at the same time, emit a run-time warning if they try to call it, telling that it is not implemented in the derived class: action must thus be taken on the user side to override it.

In other word, this method acts as a "runtime purely virtual" warning instead of a "compiler purely virtual" error.

Warning

This interface is a legacy function that is no longer recommended to be used by new development code.

Note

The name "AbstractMethod" does not imply that it's an abstract method in the strict C++ sense.

Definition at line 1149 of file TObject.cxx.

Add()

void TGraph::Add ( TF1 * f, Double_t c1 = 1 )

virtualinherited

Performs the operation: y = y + c1*f(x,y) Errors are not recalculated.

Parameters

f	may be a 1-D function TF1 or 2-d function TF2
c1	a scaling factor, 1 by default

Definition at line 650 of file TGraph.cxx.

AddPoint()

virtual void TGraph::AddPoint ( Double_t x, Double_t y )

inlinevirtualinherited

Append a new point to the graph.

Definition at line 97 of file TGraph.h.

AddPointError()

void TGraphErrors::AddPointError ( Double_t x, Double_t y, Double_t ex = 0., Double_t ey = 0. )

virtualinherited

Add a point with errorbars to the graph.

Definition at line 389 of file TGraphErrors.cxx.

AddToTObjectTable()

void TObject::AddToTObjectTable ( TObject * op )

staticprivateinherited

Private helper function which will dispatch to TObjectTable::AddObj.

Included here to avoid circular dependency between header files.

Definition at line 195 of file TObject.cxx.

Allocate()

Double_t ** TGraphErrors::Allocate ( Int_t newsize )

inlineoverrideprotectedvirtualinherited

Allocate internal data structures for newsize points.

Reimplemented from TGraph.

Definition at line 81 of file TGraphErrors.h.

AllocateArrays()

Double_t ** TGraph::AllocateArrays ( Int_t Narrays, Int_t arraySize )

protectedinherited

Allocate arrays.

Definition at line 626 of file TGraph.cxx.

AppendPad()

void TObject::AppendPad ( Option_t * option = "" )

virtualinherited

Append graphics object to current pad.

In case no current pad is set yet, create a default canvas with the name "c1".

Definition at line 204 of file TObject.cxx.

Apply()

void TGraphErrors::Apply ( TF1 * f )

overridevirtualinherited

Apply function to all the data points \( y = f(x,y) \).

The error is calculated as \( ey=(f(x,y+ey)-f(x,y-ey))/2 \). This is the same as \( error(fy) = df/dy * ey \) for small errors.

For generic functions the symmetric errors might become non-symmetric and are averaged here. Use TGraphAsymmErrors if desired.

Error on \( x \) doesn't change.

function suggested/implemented by Miroslav Helbich helbi.nosp@m.ch@m.nosp@m.ail.d.nosp@m.esy..nosp@m.de

Reimplemented from TGraph.

Definition at line 408 of file TGraphErrors.cxx.

ApplyX()

void TGraphErrors::ApplyX ( TF1 * f )

virtualinherited

Apply function to all the data points \( x = f(x,y) \).

The error is calculated as \( ex=(f(x+ex,y)-f(x-ex,y))/2 \). This is the same as \( error(fx) = df/dx * ex \) for small errors.

For generic functions the symmetric errors might become non-symmetric and are averaged here. Use TGraphAsymmErrors if desired.

Error on \( y \) doesn't change.

Definition at line 438 of file TGraphErrors.cxx.

Browse()

void TGraph::Browse ( TBrowser * b )

overridevirtualinherited

Browse.

Reimplemented from TObject.

Definition at line 679 of file TGraph.cxx.

CalculateScanfFields()

Int_t TGraphErrors::CalculateScanfFields ( const char * fmt )

staticinherited

Calculate scan fields.

Definition at line 461 of file TGraphErrors.cxx.

CheckedHash()

ULong_t TObject::CheckedHash ( )

inlineinherited

Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.

The intent is for this routine to be called instead of directly calling the function Hash during "insert" operations. See TObject::HasInconsistenTObjectHash();

(*) The setup is consistent when all classes in the class hierarchy that overload TObject::Hash do call ROOT::CallRecursiveRemoveIfNeeded in their destructor. i.e. it is safe to call the Hash virtual function during the RecursiveRemove operation.

Definition at line 332 of file TObject.h.

Chisquare()

Double_t TGraph::Chisquare ( TF1 * func, Option_t * option = "" ) const

virtualinherited

Return the chisquare of this graph with respect to f1.

The chisquare is computed as the sum of the quantity below at each point:

\[ \frac{(y-f1(x))^{2}}{ey^{2}+(\frac{1}{2}(exl+exh)f1'(x))^{2}} \]

where x and y are the graph point coordinates and f1'(x) is the derivative of function f1(x). This method to approximate the uncertainty in y because of the errors in x, is called "effective variance" method. In case of a pure TGraph, the denominator is 1. In case of a TGraphErrors or TGraphAsymmErrors the errors are taken into account. By default the range of the graph is used whatever function range. Use option "R" to use the function range

Definition at line 705 of file TGraph.cxx.

Class()

static TClass * TGraphPolar::Class ( )

static

Returns

TClass describing this class

Class_Name()

static const char * TGraphPolar::Class_Name ( )

static

Returns

Name of this class

Class_Version()

static constexpr Version_t TGraphPolar::Class_Version ( )

inlinestaticconstexpr

Returns

Version of this class

Definition at line 58 of file TGraphPolar.h.

ClassName()

const char * TObject::ClassName ( ) const

virtualinherited

Returns name of class to which the object belongs.

Definition at line 227 of file TObject.cxx.

Clear()

void TNamed::Clear ( Option_t * option = "" )

overridevirtualinherited

Set name and title to empty strings ("").

Reimplemented from TObject.

Reimplemented in TStreamerInfo, TVirtualStreamerInfo, TProcessID, TTask, TPrincipal, and TVirtualFitter.

Definition at line 63 of file TNamed.cxx.

Clone()

TObject * TNamed::Clone ( const char * newname = "" ) const

overridevirtualinherited

Make a clone of an object using the Streamer facility.

If newname is specified, this will be the name of the new object.

Reimplemented from TObject.

Reimplemented in TStreamerInfo, and TTreeIndex.

Definition at line 73 of file TNamed.cxx.

Compare()

Int_t TNamed::Compare ( const TObject * obj ) const

overridevirtualinherited

Compare two TNamed objects.

Returns 0 when equal, -1 when this is smaller and +1 when bigger (like strcmp).

Reimplemented from TObject.

Reimplemented in TStructNodeProperty.

Definition at line 84 of file TNamed.cxx.

CompareArg()

Bool_t TGraph::CompareArg ( const TGraph * gr, Int_t left, Int_t right )

staticinherited

Return kTRUE if point number "left"'s argument (angle with respect to positive x-axis) is bigger than that of point number "right".

Can be used by Sort.

Definition at line 722 of file TGraph.cxx.

CompareRadius()

Bool_t TGraph::CompareRadius ( const TGraph * gr, Int_t left, Int_t right )

staticinherited

Return kTRUE if point number "left"'s distance to origin is bigger than that of point number "right".

Can be used by Sort.

Definition at line 750 of file TGraph.cxx.

CompareX()

Bool_t TGraph::CompareX ( const TGraph * gr, Int_t left, Int_t right )

staticinherited

Return kTRUE if fX[left] > fX[right]. Can be used by Sort.

Definition at line 733 of file TGraph.cxx.

CompareY()

Bool_t TGraph::CompareY ( const TGraph * gr, Int_t left, Int_t right )

staticinherited

Return kTRUE if fY[left] > fY[right]. Can be used by Sort.

Definition at line 741 of file TGraph.cxx.

ComputeRange()

void TGraphErrors::ComputeRange ( Double_t & xmin, Double_t & ymin, Double_t & xmax, Double_t & ymax ) const

overridevirtualinherited

Compute range.

Reimplemented from TGraph.

Definition at line 492 of file TGraphErrors.cxx.

Copy() [1/4]

void TAttFill::Copy ( TAttFill & attfill ) const

inherited

Copy this fill attributes to a new TAttFill.

Definition at line 203 of file TAttFill.cxx.

Copy() [2/4]

void TAttLine::Copy ( TAttLine & attline ) const

inherited

Copy this line attributes to a new TAttLine.

Definition at line 176 of file TAttLine.cxx.

Copy() [3/4]

void TAttMarker::Copy ( TAttMarker & attmarker ) const

inherited

Copy this marker attributes to a new TAttMarker.

Definition at line 243 of file TAttMarker.cxx.

Copy() [4/4]

void TNamed::Copy ( TObject & named ) const

overridevirtualinherited

Copy this to obj.

Reimplemented from TObject.

Reimplemented in TSystemDirectory, TSystemFile, TProfile, TProfile2D, TProfile3D, TPieSlice, TStyle, TText, and TXTRU.

Definition at line 93 of file TNamed.cxx.

CopyAndRelease()

void TGraphErrors::CopyAndRelease ( Double_t ** newarrays, Int_t ibegin, Int_t iend, Int_t obegin )

overrideprotectedvirtualinherited

Copy and release.

Reimplemented from TGraph.

Definition at line 522 of file TGraphErrors.cxx.

CopyPoints()

Bool_t TGraphErrors::CopyPoints ( Double_t ** arrays, Int_t ibegin, Int_t iend, Int_t obegin )

overrideprotectedvirtualinherited

Copy errors from fEX and fEY to arrays[0] and arrays[1] or to fEX and fEY if arrays == 0 and ibegin != iend.

Reimplemented from TGraph.

Definition at line 544 of file TGraphErrors.cxx.

CreatePolargram()

TGraphPolargram * TGraphPolar::CreatePolargram

(

const char *

opt

)

Create polargram object for given draw options.

Definition at line 158 of file TGraphPolar.cxx.

CtorAllocate()

Bool_t TGraphErrors::CtorAllocate ( )

protectedinherited

Constructor allocate.

Note: This function should be called only from the constructor since it does not delete previously existing arrays.

Definition at line 569 of file TGraphErrors.cxx.

DeclFileName()

static const char * TGraphPolar::DeclFileName ( )

inlinestatic

Returns

Name of the file containing the class declaration

Definition at line 58 of file TGraphPolar.h.

Delete()

void TObject::Delete ( Option_t * option = "" )

virtualinherited

Delete this object.

Typically called as a command via the interpreter. Normally use "delete" operator when object has been allocated on the heap.

Reimplemented in TDirectory, TDirectoryFile, TFile, TSystemDirectory, TSystemFile, TTreeViewer, TGItemContext, TCanvas, TGFrame, TGTextEdit, TAxis, RooLinkedList, TExMap, TObjectTable, TProtoClass, TKeySQL, TKeyXML, TQCommand, TBtree, TClonesArray, THashList, THashTable, TList, TMap, TObjArray, TOrdCollection, TRefArray, TListOfDataMembers, TListOfEnums, TListOfEnumsWithLock, TListOfFunctions, TListOfFunctionTemplates, TViewPubDataMembers, TViewPubFunctions, TThread, TKey, TMVA::Results, TTree, and TCollection.

Definition at line 268 of file TObject.cxx.

DistancetoLine()

Int_t TAttLine::DistancetoLine ( Int_t px, Int_t py, Double_t xp1, Double_t yp1, Double_t xp2, Double_t yp2 )

inherited

Compute distance from point px,py to a line.

Compute the closest distance of approach from point px,py to this line. The distance is computed in pixels units.

Algorithm:

  A(x1,y1)         P                             B(x2,y2)
  -----------------+------------------------------
                   |
                   |
                   |
                   |
                  M(x,y)
 
Let us call  a = distance AM     A=a**2
             b = distance BM     B=b**2
             c = distance AB     C=c**2
             d = distance PM     D=d**2
             u = distance AP     U=u**2
             v = distance BP     V=v**2     c = u + v
 
D = A - U
D = B - V  = B -(c-u)**2
   ==> u = (A -B +C)/2c

Definition at line 210 of file TAttLine.cxx.

DistancetoPrimitive()

Int_t TGraph::DistancetoPrimitive ( Int_t px, Int_t py )

overridevirtualinherited

Compute distance from point px,py to a graph.

Compute the closest distance of approach from point px,py to this line. The distance is computed in pixels units.

Reimplemented from TObject.

Definition at line 907 of file TGraph.cxx.

DoError()

void TObject::DoError ( int level, const char * location, const char * fmt, va_list va ) const

protectedvirtualinherited

Interface to ErrorHandler (protected).

Reimplemented in TTreeViewer, and TThread.

Definition at line 1059 of file TObject.cxx.

DoMerge()

Bool_t TGraphErrors::DoMerge ( const TGraph * g )

overrideprotectedvirtualinherited

Protected function to perform the merge operation of a graph with errors.

Reimplemented from TGraph.

Definition at line 585 of file TGraphErrors.cxx.

Draw()

void TGraphPolar::Draw ( Option_t * options = "" )

overridevirtual

Draw TGraphPolar.

Reimplemented from TGraph.

Definition at line 99 of file TGraphPolar.cxx.

DrawClass()

void TObject::DrawClass ( ) const

virtualinherited

Draw class inheritance tree of the class to which this object belongs.

If a class B inherits from a class A, description of B is drawn on the right side of description of A. Member functions overridden by B are shown in class A with a blue line crossing-out the corresponding member function. The following picture is the class inheritance tree of class TPaveLabel:

Reimplemented in TSystemDirectory, TSystemFile, and TGFrame.

Definition at line 308 of file TObject.cxx.

DrawClone()

TObject * TObject::DrawClone ( Option_t * option = "" ) const

virtualinherited

Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1).

If pad was not selected - gPad will be used.

Note

For histograms, use the more specialised TH1::DrawCopy().

Reimplemented in TSystemDirectory, TSystemFile, TGFrame, TAxis, and TCanvas.

Definition at line 319 of file TObject.cxx.

DrawGraph() [1/3]

void TGraph::DrawGraph ( Int_t n, const Double_t * x = nullptr, const Double_t * y = nullptr, Option_t * option = "" )

virtualinherited

Draw this graph with new attributes.

Definition at line 943 of file TGraph.cxx.

DrawGraph() [2/3]

void TGraph::DrawGraph ( Int_t n, const Float_t * x, const Float_t * y, Option_t * option = "" )

virtualinherited

Draw this graph with new attributes.

Definition at line 930 of file TGraph.cxx.

DrawGraph() [3/3]

void TGraph::DrawGraph ( Int_t n, const Int_t * x, const Int_t * y, Option_t * option = "" )

virtualinherited

Draw this graph with new attributes.

Definition at line 917 of file TGraph.cxx.

DrawPanel()

void TGraph::DrawPanel ( )

virtualinherited

Display a panel with all graph drawing options.

Definition at line 960 of file TGraph.cxx.

Dump()

void TObject::Dump ( ) const

virtualinherited

Dump contents of object on stdout.

Using the information in the object dictionary (class TClass) each data member is interpreted. If a data member is a pointer, the pointer value is printed

The following output is the Dump of a TArrow object:

fAngle                   0           Arrow opening angle (degrees)
fArrowSize               0.2         Arrow Size
fOption.*fData
fX1                      0.1         X of 1st point
fY1                      0.15        Y of 1st point
fX2                      0.67        X of 2nd point
fY2                      0.83        Y of 2nd point
fUniqueID                0           object unique identifier
fBits                    50331648    bit field status word
fLineColor               1           line color
fLineStyle               1           line style
fLineWidth               1           line width
fFillColor               19          fill area color
fFillStyle               1001        fill area style

Reimplemented in TSystemFile, TCollection, TClass, TGFrame, and TGPack.

Definition at line 367 of file TObject.cxx.

Error()

void TObject::Error ( const char * location, const char * fmt, ... ) const

virtualinherited

Issue error message.

Use "location" to specify the method where the error occurred. Accepts standard printf formatting arguments.

Reimplemented in TFitResult.

Definition at line 1098 of file TObject.cxx.

Eval()

Double_t TGraph::Eval ( Double_t x, TSpline * spline = nullptr, Option_t * option = "" ) const

virtualinherited

Interpolate points in this graph at x using a TSpline.

• if spline==0 and option="" a linear interpolation between the two points close to x is computed. If x is outside the graph range, a linear extrapolation is computed.
• if spline==0 and option="S" a TSpline3 object is created using this graph and the interpolated value from the spline is returned. the internally created spline is deleted on return.

• if spline is specified, it is used to return the interpolated value.

  If the points are sorted in X a binary search is used (significantly faster) One needs to set the bit TGraph::SetBit(TGraph::kIsSortedX) before calling TGraph::Eval to indicate that the graph is sorted in X.

Definition at line 981 of file TGraph.cxx.

Execute() [1/2]

void TObject::Execute ( const char * method, const char * params, Int_t * error = nullptr )

virtualinherited

Execute method on this object with the given parameter string, e.g.

"3.14,1,\"text\"".

Reimplemented in TMethodCall, TCling, TInterpreter, ROOT::R::TRInterface, and TContextMenu.

Definition at line 378 of file TObject.cxx.

Execute() [2/2]

void TObject::Execute ( TMethod * method, TObjArray * params, Int_t * error = nullptr )

virtualinherited

Execute method on this object with parameters stored in the TObjArray.

The TObjArray should contain an argv vector like:

argv[0] ... argv[n] = the list of TObjString parameters

Reimplemented in TCling, TMethodCall, TInterpreter, ROOT::R::TRInterface, and TContextMenu.

Definition at line 398 of file TObject.cxx.

ExecuteEvent()

void TGraph::ExecuteEvent ( Int_t event, Int_t px, Int_t py )

overridevirtualinherited

Execute action corresponding to one event.

This member function is called when a graph is clicked with the locator

If Left button clicked on one of the line end points, this point follows the cursor until button is released.

if Middle button clicked, the line is moved parallel to itself until the button is released.

Reimplemented from TObject.

Definition at line 1084 of file TGraph.cxx.

Expand() [1/2]

void TGraph::Expand ( Int_t newsize )

virtualinherited

If array sizes <= newsize, expand storage to 2*newsize.

Definition at line 1093 of file TGraph.cxx.

Expand() [2/2]

void TGraph::Expand ( Int_t newsize, Int_t step )

virtualinherited

If graph capacity is less than newsize points then make array sizes equal to least multiple of step to contain newsize points.

Definition at line 1103 of file TGraph.cxx.

ExpandAndCopy()

Double_t ** TGraph::ExpandAndCopy ( Int_t size, Int_t iend )

protectedinherited

if size > fMaxSize allocate new arrays of 2*size points and copy iend first points.

Return pointer to new arrays.

Definition at line 1117 of file TGraph.cxx.

Fatal()

void TObject::Fatal ( const char * location, const char * fmt, ... ) const

virtualinherited

Issue fatal error message.

Use "location" to specify the method where the fatal error occurred. Accepts standard printf formatting arguments.

Definition at line 1126 of file TObject.cxx.

FillBuffer()

void TNamed::FillBuffer ( char *& buffer )

virtualinherited

Encode TNamed into output buffer.

Reimplemented in TKeySQL, TSQLFile, TKeyXML, TXMLFile, TDirectoryFile, TFile, and TKey.

Definition at line 103 of file TNamed.cxx.

FillZero()

void TGraphErrors::FillZero ( Int_t begin, Int_t end, Bool_t from_ctor = kTRUE )

overrideprotectedvirtualinherited

Set zero values for point arrays in the range [begin, end].

Reimplemented from TGraph.

Definition at line 610 of file TGraphErrors.cxx.

FindObject() [1/2]

TObject * TGraph::FindObject ( const char * name ) const

overridevirtualinherited

Search object named name in the list of functions.

Reimplemented from TObject.

Definition at line 1139 of file TGraph.cxx.

FindObject() [2/2]

TObject * TGraph::FindObject ( const TObject * obj ) const

overridevirtualinherited

Search object obj in the list of functions.

Reimplemented from TObject.

Definition at line 1147 of file TGraph.cxx.

Fit() [1/2]

TFitResultPtr TGraph::Fit ( const char * fname, Option_t * option = "", Option_t * goption = "", Axis_t xmin = 0, Axis_t xmax = 0 )

virtualinherited

Fit this graph with the global function named fname.

This will retrieve the function with name fname from ROOT's global list of functions, and use it to fit the data in the TGraph. TF1 or TF2 functions that have been created in the same ROOT session can be accessed using fname. Predefined functions such as gaus, expo, poln, etc. are automatically created by ROOT.

See also

TF1::InitStandardFunctions, TF2::InitStandardFunctions, TF3::InitStandardFunctions

Note that using a global function is not thread safe. In this case, use the overload TGraph::Fit(TF1 *f1,Option_t *, Option_t *, Axis_t, Axis_t) with a locally created function. For more details about fitting a TGraph, see the same overload.

The parameter fname can also be a formula, accepted by the linear fitter (linear parts divided by "++" sign), for example "x++sin(x)" for fitting "[0]*x+[1]*sin(x)"

Definition at line 1285 of file TGraph.cxx.

Fit() [2/2]

TFitResultPtr TGraph::Fit ( TF1 * f1, Option_t * option = "", Option_t * goption = "", Axis_t rxmin = 0, Axis_t rxmax = 0 )

virtualinherited

Fit this graph with function f1.

Parameters

[in]	f1	pointer to the function object
[in]	option	string defining the fit options (see table below).
[in]	goption	specify a list of graphics options. See TGraph::Draw and TGraphPainter for a complete list of these possible options.
[in]	rxmin	lower fitting range
[in]	rxmax	upper fitting range

Graph Fitting Options

The list of fit options is given in parameter option.

option	description
"S"	The full result of the fit is returned in the TFitResultPtr. This is needed to get the covariance matrix of the fit. See TFitResult and the base class ROOT::Math::FitResult.
"W"	Ignore all point errors when fitting a TGraphErrors or TGraphAsymmErrors
"F"	Uses the default minimizer (e.g. Minuit) when fitting a linear function (e.g. polN) instead of the linear fitter.
"U"	Uses a user specified objective function (e.g. user providedlikelihood function) defined using TVirtualFitter::SetFCN
"E"	Performs a better parameter errors estimation using the Minos technique for all fit parameters.
"M"	Uses the IMPROVE algorithm (available only in TMinuit). This algorithm attempts improve the found local minimum by searching for a better one.
"Q"	Quiet mode (minimum printing)
"V"	Verbose mode (default is between Q and V)
"+"	Adds this new fitted function to the list of fitted functions. By default, the previous function is deleted and only the last one is kept.
"N"	Does not store the graphics function, does not draw the histogram with the function after fitting.
"0"	Does not draw the histogram and the fitted function after fitting, but in contrast to option "N", it stores the fitted function in the histogram list of functions.
"R"	Fit using a fitting range specified in the function range with TF1::SetRange.
"B"	Use this option when you want to fix one or more parameters and the fitting function is a predefined one (e.g gaus, expo,..), otherwise in case of pre-defined functions, some default initial values and limits are set.
"C"	In case of linear fitting, do no calculate the chisquare (saves CPU time).
"G"	Uses the gradient implemented in TF1::GradientPar for the minimization. This allows to use Automatic Differentiation when it is supported by the provided TF1 function.
"EX0"	When fitting a TGraphErrors or TGraphAsymErrors do not consider errors in the X coordinates
"ROB"	In case of linear fitting, compute the LTS regression coefficients (robust (resistant) regression), using the default fraction of good points "ROB=0.x" - compute the LTS regression coefficients, using 0.x as a fraction of good points

This function is used for fitting also the derived TGraph classes such as TGraphErrors or TGraphAsymmErrors. See the note below on how the errors are used when fitting a TGraphErrors or TGraphAsymmErrors.

The fitting of the TGraph, i.e simple data points without any error associated, is performed using the un-weighted least-square (chi-square) method.

TGraphErrors fit:

In case of a TGraphErrors or TGraphAsymmErrors object, when x errors are present, the error along x, is projected along the y-direction by calculating the function at the points x-ex_low and x+ex_high, where ex_low and ex_high are the corresponding lower and upper error in x. The chi-square is then computed as the sum of the quantity below at each data point:

\[ \frac{(y-f(x))^{2}}{ey^{2}+(\frac{1}{2}(exl+exh)f'(x))^{2}} \]

where x and y are the point coordinates, and ‘f’(x)is the derivative of the functionf(x)`.

In case of asymmetric errors, if the function lies below (above) the data point, ey is ey_low (ey_high).

The approach used to approximate the uncertainty in y because of the errors in x is to make it equal the error in x times the slope of the line. This approach is called "effective variance method" and the implementation is provided in the function FitUtil::EvaluateChi2Effective

Linear fitting:

When the fitting function is linear (contains the ++ sign) or the fitting function is a polynomial, a linear fitter is initialised. To create a linear function, use the following syntax: linear parts separated by ++ sign. Example: to fit the parameters of the function p0*x + p1*sin(x), you can create a TF1 object as

TF1 *f1 = new TF1("f1", "x++sin(x)", xmin, xmax);

For such a TF1 you don't have to set the initial conditions and the linear fitter is used. Going via the linear fitter for functions, linear in parameters, gives a considerable advantage in speed. When using the linear fitting it is also possible to perform a robust fitting with the Least Trimmed Square (LTS) regression algorithm, by using the fit option ROB. See the tutorial fitLinearRobust.C.

Notes on TGraph/TGraphErrors Fitting:

1. By using the "effective variance" method a simple linear regression becomes a non-linear case, which takes several iterations instead of 0 as in the linear case.
2. The effective variance technique assumes that there is no correlation between the x and y coordinate.
3. The standard chi2 (least square) method without error in the coordinates (x) can be forced by using option "EX0"
4. The linear fitter doesn't take into account the errors in x. When fitting a TGraphErrors with a linear functions the errors in x will not be considered. If errors in x are important, use option "F" for linear function fitting.
5. When fitting a TGraph (i.e. no errors associated with each point), a correction is applied to the errors on the parameters with the following formula: parameter_error *= sqrt(chisquare/(ndf-1))

General Fitting documentation

See in TH1::Fit for the documentation of

• Fit Result
• Fit Status
• Fit Statistics Box
• Fitting in a Range
• Setting Initial Conditions

Definition at line 1259 of file TGraph.cxx.

FitPanel()

void TGraph::FitPanel ( )

virtualinherited

Display a GUI panel with all graph fit options.

See class TFitEditor for example

Definition at line 1305 of file TGraph.cxx.

GetCorrelationFactor()

Double_t TGraph::GetCorrelationFactor ( ) const

virtualinherited

Return graph correlation factor.

Definition at line 1327 of file TGraph.cxx.

GetCovariance()

Double_t TGraph::GetCovariance ( ) const

virtualinherited

Return covariance of vectors x,y.

Definition at line 1339 of file TGraph.cxx.

GetDrawOption()

Option_t * TObject::GetDrawOption ( ) const

virtualinherited

Get option used by the graphics system to draw this object.

Note that before calling object.GetDrawOption(), you must have called object.Draw(..) before in the current pad.

Reimplemented in TBrowser, TFitEditor, TGedFrame, TGFileBrowser, TRootBrowser, and TRootBrowserLite.

Definition at line 445 of file TObject.cxx.

GetDtorOnly()

Longptr_t TObject::GetDtorOnly ( )

staticinherited

Return destructor only flag.

Definition at line 1196 of file TObject.cxx.

GetEditable()

Bool_t TGraph::GetEditable ( ) const

inherited

Return kTRUE if kNotEditable bit is not set, kFALSE otherwise.

Definition at line 2330 of file TGraph.cxx.

GetErrorX()

Double_t TGraphErrors::GetErrorX ( Int_t bin ) const

overridevirtualinherited

It returns the error along X at point i.

Reimplemented from TGraph.

Definition at line 624 of file TGraphErrors.cxx.

GetErrorXhigh()

Double_t TGraphErrors::GetErrorXhigh ( Int_t i ) const

overridevirtualinherited

It returns the error along X at point i.

For TGraphErrors this method is the same as GetErrorX.

Reimplemented from TGraph.

Definition at line 647 of file TGraphErrors.cxx.

GetErrorXlow()

Double_t TGraphErrors::GetErrorXlow ( Int_t i ) const

overridevirtualinherited

It returns the error along X at point i.

For TGraphErrors this method is the same as GetErrorX.

Reimplemented from TGraph.

Definition at line 659 of file TGraphErrors.cxx.

GetErrorY()

Double_t TGraphErrors::GetErrorY ( Int_t bin ) const

overridevirtualinherited

It returns the error along Y at point i.

Reimplemented from TGraph.

Definition at line 635 of file TGraphErrors.cxx.

GetErrorYhigh()

Double_t TGraphErrors::GetErrorYhigh ( Int_t i ) const

overridevirtualinherited

It returns the error along Y at point i.

For TGraphErrors this method is the same as GetErrorY.

Reimplemented from TGraph.

Definition at line 671 of file TGraphErrors.cxx.

GetErrorYlow()

Double_t TGraphErrors::GetErrorYlow ( Int_t i ) const

overridevirtualinherited

It returns the error along Y at point i.

For TGraphErrors this method is the same as GetErrorY.

Reimplemented from TGraph.

Definition at line 683 of file TGraphErrors.cxx.

GetEX()

Double_t * TGraphErrors::GetEX ( ) const

inlineoverridevirtualinherited

Reimplemented from TGraph.

Definition at line 69 of file TGraphErrors.h.

GetEXhigh()

virtual Double_t * TGraph::GetEXhigh ( ) const

inlinevirtualinherited

Reimplemented in TGraphAsymmErrors, TGraphBentErrors, and TGraphMultiErrors.

Definition at line 142 of file TGraph.h.

GetEXhighd()

virtual Double_t * TGraph::GetEXhighd ( ) const

inlinevirtualinherited

Reimplemented in TGraphBentErrors.

Definition at line 147 of file TGraph.h.

GetEXlow()

virtual Double_t * TGraph::GetEXlow ( ) const

inlinevirtualinherited

Reimplemented in TGraphAsymmErrors, TGraphBentErrors, and TGraphMultiErrors.

Definition at line 143 of file TGraph.h.

GetEXlowd()

virtual Double_t * TGraph::GetEXlowd ( ) const

inlinevirtualinherited

Reimplemented in TGraphBentErrors.

Definition at line 146 of file TGraph.h.

GetEY()

Double_t * TGraphErrors::GetEY ( ) const

inlineoverridevirtualinherited

Reimplemented from TGraph.

Definition at line 70 of file TGraphErrors.h.

GetEYhigh()

virtual Double_t * TGraph::GetEYhigh ( ) const

inlinevirtualinherited

Reimplemented in TGraphAsymmErrors, TGraphBentErrors, and TGraphMultiErrors.

Definition at line 144 of file TGraph.h.

GetEYhighd()

virtual Double_t * TGraph::GetEYhighd ( ) const

inlinevirtualinherited

Reimplemented in TGraphBentErrors.

Definition at line 149 of file TGraph.h.

GetEYlow()

virtual Double_t * TGraph::GetEYlow ( ) const

inlinevirtualinherited

Reimplemented in TGraphAsymmErrors, TGraphBentErrors, and TGraphMultiErrors.

Definition at line 145 of file TGraph.h.

GetEYlowd()

virtual Double_t * TGraph::GetEYlowd ( ) const

inlinevirtualinherited

Reimplemented in TGraphBentErrors.

Definition at line 148 of file TGraph.h.

GetFillColor()

virtual Color_t TAttFill::GetFillColor ( ) const

inlinevirtualinherited

Return the fill area color.

Reimplemented in TGraphMultiErrors, TGWin32, TGWin32VirtualXProxy, and TGX11.

Definition at line 32 of file TAttFill.h.

GetFillStyle()

virtual Style_t TAttFill::GetFillStyle ( ) const

inlinevirtualinherited

Return the fill area style.

Reimplemented in TGraphMultiErrors, TGWin32, TGWin32VirtualXProxy, and TGX11.

Definition at line 33 of file TAttFill.h.

GetFunction()

TF1 * TGraph::GetFunction ( const char * name ) const

inherited

Return pointer to function with name.

Functions such as TGraph::Fit store the fitted function in the list of functions of this graph.

Definition at line 1447 of file TGraph.cxx.

GetHistogram()

TH1F * TGraph::GetHistogram ( ) const

virtualinherited

Returns a pointer to the histogram used to draw the axis Takes into account the two following cases.

1. option 'A' was specified in TGraph::Draw. Return fHistogram
2. user had called TPad::DrawFrame. return pointer to hframe histogram

Definition at line 1458 of file TGraph.cxx.

GetIconName()

const char * TObject::GetIconName ( ) const

virtualinherited

Returns mime type name of object.

Used by the TBrowser (via TGMimeTypes class). Override for class of which you would like to have different icons for objects of the same class.

Reimplemented in TSystemFile, TGeoVolume, TASImage, TGMainFrame, TKey, ROOT::Experimental::XRooFit::xRooNode, TBranch, TVirtualBranchBrowsable, TMethodBrowsable, and TBranchElement.

Definition at line 472 of file TObject.cxx.

GetLineColor()

virtual Color_t TAttLine::GetLineColor ( ) const

inlinevirtualinherited

Return the line color.

Reimplemented in TGraphMultiErrors, and TGWin32VirtualXProxy.

Definition at line 36 of file TAttLine.h.

GetLineStyle()

virtual Style_t TAttLine::GetLineStyle ( ) const

inlinevirtualinherited

Return the line style.

Reimplemented in TGraphMultiErrors, TGWin32, TGWin32VirtualXProxy, and TGX11.

Definition at line 37 of file TAttLine.h.

GetLineWidth()

virtual Width_t TAttLine::GetLineWidth ( ) const

inlinevirtualinherited

Return the line width.

Reimplemented in TGraphMultiErrors, TGWin32, TGWin32VirtualXProxy, and TGX11.

Definition at line 38 of file TAttLine.h.

GetListOfFunctions()

TList * TGraph::GetListOfFunctions ( ) const

inlineinherited

Definition at line 125 of file TGraph.h.

GetMarkerColor()

virtual Color_t TAttMarker::GetMarkerColor ( ) const

inlinevirtualinherited

Return the marker color.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 33 of file TAttMarker.h.

GetMarkerLineWidth()

Width_t TAttMarker::GetMarkerLineWidth ( Style_t style )

staticinherited

Internal helper function that returns the line width of the given marker style (0 = filled marker)

Definition at line 305 of file TAttMarker.cxx.

GetMarkerSize()

virtual Size_t TAttMarker::GetMarkerSize ( ) const

inlinevirtualinherited

Return the marker size.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 35 of file TAttMarker.h.

GetMarkerStyle()

virtual Style_t TAttMarker::GetMarkerStyle ( ) const

inlinevirtualinherited

Return the marker style.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 34 of file TAttMarker.h.

GetMarkerStyleBase()

Style_t TAttMarker::GetMarkerStyleBase ( Style_t style )

staticinherited

Internal helper function that returns the corresponding marker style with line width 1 for the given style.

Definition at line 254 of file TAttMarker.cxx.

GetMaximum()

Double_t TGraph::GetMaximum ( ) const

inlineinherited

Definition at line 150 of file TGraph.h.

GetMaxSize()

Int_t TGraph::GetMaxSize ( ) const

inlineinherited

Definition at line 130 of file TGraph.h.

GetMean()

Double_t TGraph::GetMean ( Int_t axis = 1 ) const

virtualinherited

Return mean value of X (axis=1) or Y (axis=2)

Definition at line 1355 of file TGraph.cxx.

GetMinimum()

Double_t TGraph::GetMinimum ( ) const

inlineinherited

Definition at line 151 of file TGraph.h.

GetN()

Int_t TGraph::GetN ( ) const

inlineinherited

Definition at line 131 of file TGraph.h.

GetName()

const char * TNamed::GetName ( ) const

inlineoverridevirtualinherited

Returns name of object.

This default method returns the class name. Classes that give objects a name should override this method.

Reimplemented from TObject.

Definition at line 49 of file TNamed.h.

GetObjectInfo()

char * TGraph::GetObjectInfo ( Int_t px, Int_t py ) const

overridevirtualinherited

Implementation to get information on point of graph at cursor position Adapted from class TH1.

Reimplemented from TObject.

Definition at line 1615 of file TGraph.cxx.

GetObjectStat()

Bool_t TObject::GetObjectStat ( )

staticinherited

Get status of object stat flag.

Definition at line 1181 of file TObject.cxx.

GetOption()

virtual Option_t * TObject::GetOption ( ) const

inlinevirtualinherited

Reimplemented in TGeoVolume, TArrow, TGaxis, TLegendEntry, TPave, TPolyLine, TAxis3D, THelix, TNode, TPolyLine3D, TPolyMarker3D, TH1, TPolyMarker, TFile, TMapFile, TPSocket, TSocket, TUDPSocket, TSelector, and TPoints3DABC.

Definition at line 147 of file TObject.h.

GetOptionAxis()

Bool_t TGraphPolar::GetOptionAxis ( )

inline

Definition at line 46 of file TGraphPolar.h.

GetPoint()

Int_t TGraph::GetPoint ( Int_t i, Double_t & x, Double_t & y ) const

virtualinherited

Get x and y values for point number i.

The function returns -1 in case of an invalid request or the point number otherwise

Definition at line 1563 of file TGraph.cxx.

GetPointX()

Double_t TGraph::GetPointX ( Int_t i ) const

virtualinherited

Get x value for point i.

Definition at line 1574 of file TGraph.cxx.

GetPointY()

Double_t TGraph::GetPointY ( Int_t i ) const

virtualinherited

Get y value for point i.

Definition at line 1585 of file TGraph.cxx.

GetPolargram()

TGraphPolargram * TGraphPolar::GetPolargram ( )

inline

Definition at line 39 of file TGraphPolar.h.

GetRMS()

Double_t TGraph::GetRMS ( Int_t axis = 1 ) const

virtualinherited

Return RMS of X (axis=1) or Y (axis=2)

Definition at line 1370 of file TGraph.cxx.

GetTitle()

const char * TNamed::GetTitle ( ) const

inlineoverridevirtualinherited

Returns title of object.

This default method returns the class title (i.e. description). Classes that give objects a title should override this method.

Reimplemented from TObject.

Definition at line 50 of file TNamed.h.

GetUniqueID()

UInt_t TObject::GetUniqueID ( ) const

virtualinherited

Return the unique object id.

Definition at line 480 of file TObject.cxx.

GetX()

Double_t * TGraph::GetX ( ) const

inlineinherited

Definition at line 138 of file TGraph.h.

GetXaxis()

TAxis * TGraph::GetXaxis ( ) const

inherited

Get x axis of the graph.

Definition at line 1596 of file TGraph.cxx.

GetXpol()

Double_t * TGraphPolar::GetXpol

(

)

Return points in polar coordinates.

Definition at line 107 of file TGraphPolar.cxx.

GetY()

Double_t * TGraph::GetY ( ) const

inlineinherited

Definition at line 139 of file TGraph.h.

GetYaxis()

TAxis * TGraph::GetYaxis ( ) const

inherited

Get y axis of the graph.

Definition at line 1605 of file TGraph.cxx.

GetYpol()

Double_t * TGraphPolar::GetYpol

(

)

Return points in polar coordinates.

Definition at line 116 of file TGraphPolar.cxx.

HandleTimer()

Bool_t TObject::HandleTimer ( TTimer * timer )

virtualinherited

Execute action in response of a timer timing out.

This method must be overridden if an object has to react to timers.

Reimplemented in TGWindow, TGuiBldDragManager, TGraphTime, TGLEventHandler, TGCommandPlugin, TGDNDManager, TGFileContainer, TGPopupMenu, TGScrollBar, TGShutter, TGTextEdit, TGTextEditor, TGTextEntry, TGTextView, TGToolTip, TGHtml, and TTreeViewer.

Definition at line 516 of file TObject.cxx.

Hash()

ULong_t TNamed::Hash ( ) const

inlineoverridevirtualinherited

Return hash value for this object.

Note: If this routine is overloaded in a derived class, this derived class should also add

ROOT::CallRecursiveRemoveIfNeeded(*this)

Otherwise, when RecursiveRemove is called (by ~TObject or example) for this type of object, the transversal of THashList and THashTable containers will will have to be done without call Hash (and hence be linear rather than logarithmic complexity). You will also see warnings like

Error in <ROOT::Internal::TCheckHashRecursiveRemoveConsistency::CheckRecursiveRemove>: The class SomeName overrides
TObject::Hash but does not call TROOT::RecursiveRemove in its destructor.

Reimplemented from TObject.

Definition at line 51 of file TNamed.h.

HasInconsistentHash()

Bool_t TObject::HasInconsistentHash ( ) const

inlineinherited

Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.

missing call to RecursiveRemove in destructor).

Note: Since the consistency is only tested for during inserts, this routine will return true for object that have never been inserted whether or not they have a consistent setup. This has no negative side-effect as searching for the object with the right or wrong Hash will always yield a not-found answer (Since anyway no hash can be guaranteed unique, there is always a check)

Definition at line 366 of file TObject.h.

Info()

void TObject::Info ( const char * location, const char * fmt, ... ) const

virtualinherited

Issue info message.

Use "location" to specify the method where the warning occurred. Accepts standard printf formatting arguments.

Definition at line 1072 of file TObject.cxx.

InheritsFrom() [1/2]

Bool_t TObject::InheritsFrom ( const char * classname ) const

virtualinherited

Returns kTRUE if object inherits from class "classname".

Reimplemented in TClass.

Definition at line 549 of file TObject.cxx.

InheritsFrom() [2/2]

Bool_t TObject::InheritsFrom ( const TClass * cl ) const

virtualinherited

Returns kTRUE if object inherits from TClass cl.

Reimplemented in TClass.

Definition at line 557 of file TObject.cxx.

InitExpo()

void TGraph::InitExpo ( Double_t xmin = 0, Double_t xmax = 0 )

virtualinherited

Compute Initial values of parameters for an exponential.

Definition at line 1688 of file TGraph.cxx.

InitGaus()

void TGraph::InitGaus ( Double_t xmin = 0, Double_t xmax = 0 )

virtualinherited

Compute Initial values of parameters for a gaussian.

Definition at line 1650 of file TGraph.cxx.

InitPolynom()

void TGraph::InitPolynom ( Double_t xmin = 0, Double_t xmax = 0 )

virtualinherited

Compute Initial values of parameters for a polynom.

Definition at line 1709 of file TGraph.cxx.

InsertPoint()

Int_t TGraph::InsertPoint ( )

virtualinherited

Insert a new point at the mouse position.

Definition at line 1729 of file TGraph.cxx.

InsertPointBefore()

void TGraph::InsertPointBefore ( Int_t ipoint, Double_t x, Double_t y )

virtualinherited

Insert a new point with coordinates (x,y) before the point number ipoint.

Definition at line 1779 of file TGraph.cxx.

Inspect()

void TObject::Inspect ( ) const

virtualinherited

Dump contents of this object in a graphics canvas.

Same action as Dump but in a graphical form. In addition pointers to other objects can be followed.

The following picture is the Inspect of a histogram object:

Reimplemented in TSystemFile, TInspectorObject, TGFrame, and ROOT::Experimental::XRooFit::xRooNode.

Definition at line 570 of file TObject.cxx.

Integral()

Double_t TGraph::Integral ( Int_t first = 0, Int_t last = -1 ) const

virtualinherited

Integrate the TGraph data within a given (index) range.

Note that this function computes the area of the polygon enclosed by the points of the TGraph. The polygon segments, which are defined by the points of the TGraph, do not need to form a closed polygon, since the last polygon segment, which closes the polygon, is taken as the line connecting the last TGraph point with the first one. It is clear that the order of the point is essential in defining the polygon. Also note that the segments should not intersect.

NB:

• if last=-1 (default) last is set to the last point.
• if (first <0) the first point (0) is taken.

Method:

There are many ways to calculate the surface of a polygon. It all depends on what kind of data you have to deal with. The most evident solution would be to divide the polygon in triangles and calculate the surface of them. But this can quickly become complicated as you will have to test every segments of every triangles and check if they are intersecting with a current polygon's segment or if it goes outside the polygon. Many calculations that would lead to many problems...

The solution (implemented by R.Brun)

Fortunately for us, there is a simple way to solve this problem, as long as the polygon's segments don't intersect. It takes the x coordinate of the current vertex and multiply it by the y coordinate of the next vertex. Then it subtracts from it the result of the y coordinate of the current vertex multiplied by the x coordinate of the next vertex. Then divide the result by 2 to get the surface/area.

Sources

• http://forums.wolfram.com/mathgroup/archive/1998/Mar/msg00462.html
• http://stackoverflow.com/questions/451426/how-do-i-calculate-the-surface-area-of-a-2d-polygon

Definition at line 1838 of file TGraph.cxx.

InvertBit()

void TObject::InvertBit ( UInt_t f )

inlineinherited

Definition at line 206 of file TObject.h.

IsA()

TClass * TGraphPolar::IsA ( ) const

inlineoverridevirtual

Returns

TClass describing current object

Reimplemented from TGraphErrors.

Definition at line 58 of file TGraphPolar.h.

IsDestructed()

Bool_t TObject::IsDestructed ( ) const

inlineinherited

IsDestructed.

Note

This function must be non-virtual as it can be used on destructed (but not yet modified) memory. This is used for example in TClonesArray to record the element that have been destructed but not deleted and thus are ready for re-use (by operator new with placement).

Returns

true if this object's destructor has been run.

Definition at line 186 of file TObject.h.

IsEditable()

virtual Bool_t TGraph::IsEditable ( ) const

inlinevirtualinherited

Definition at line 165 of file TGraph.h.

IsEqual()

Bool_t TObject::IsEqual ( const TObject * obj ) const

virtualinherited

Default equal comparison (objects are equal if they have the same address in memory).

More complicated classes might want to override this function.

Reimplemented in TObjString, TQCommand, TPair, and TGObject.

Definition at line 589 of file TObject.cxx.

IsFolder()

Bool_t TObject::IsFolder ( ) const

virtualinherited

Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).

Reimplemented in TDirectory, TFolder, TRemoteObject, TROOT, TSystemDirectory, TTask, TCollection, TPair, TBrowserObject, TBaseClass, TClass, TGeoManager, TGeoNode, TGeoNodeMatrix, TGeoVolume, TGeoOverlap, TGeoTrack, TCanvas, TPad, TAxis3D, TGeometry, TNode, TRootIconList, THbookFile, THbookKey, THnBase, ROOT::Internal::THnBaseBrowsable, TMultiDimFit, TPrincipal, TKey, TMapFile, TSPlot, TDatabasePDG, TParticleClassPDG, TApplicationRemote, ROOT::Experimental::XRooFit::xRooNode, TBranch, TVirtualBranchBrowsable, TBranchClones, TBranchElement, TBranchObject, TBranchSTL, and TTree.

Definition at line 579 of file TObject.cxx.

IsHighlight()

virtual Bool_t TGraph::IsHighlight ( ) const

inlinevirtualinherited

Definition at line 166 of file TGraph.h.

IsInside()

Int_t TGraph::IsInside ( Double_t x, Double_t y ) const

virtualinherited

Return 1 if the point (x,y) is inside the polygon defined by the graph vertices 0 otherwise.

Algorithm:

The loop is executed with the end-point coordinates of a line segment (X1,Y1)-(X2,Y2) and the Y-coordinate of a horizontal line. The counter inter is incremented if the line (X1,Y1)-(X2,Y2) intersects the horizontal line. In this case XINT is set to the X-coordinate of the intersection point. If inter is an odd number, then the point x,y is within the polygon.

Definition at line 1871 of file TGraph.cxx.

IsOnHeap()

R__ALWAYS_INLINE Bool_t TObject::IsOnHeap ( ) const

inlineinherited

Definition at line 160 of file TObject.h.

IsSortable()

Bool_t TNamed::IsSortable ( ) const

inlineoverridevirtualinherited

Reimplemented from TObject.

Reimplemented in TStructNodeProperty.

Definition at line 52 of file TNamed.h.

IsTransparent()

Bool_t TAttFill::IsTransparent ( ) const

inlinevirtualinherited

Reimplemented in TGWin32VirtualXProxy.

Definition at line 49 of file TAttFill.h.

IsZombie()

R__ALWAYS_INLINE Bool_t TObject::IsZombie ( ) const

inlineinherited

Definition at line 161 of file TObject.h.

LeastSquareFit()

void TGraph::LeastSquareFit ( Int_t m, Double_t * a, Double_t xmin = 0, Double_t xmax = 0 )

virtualinherited

Least squares polynomial fitting without weights.

Parameters

[in]	m	number of parameters
[in]	a	array of parameters
[in]	xmin	1st point number to fit (default =0)
[in]	xmax	last point number to fit (default=fNpoints-1)

based on CERNLIB routine LSQ: Translated to C++ by Rene Brun

Definition at line 1886 of file TGraph.cxx.

LeastSquareLinearFit()

void TGraph::LeastSquareLinearFit ( Int_t ndata, Double_t & a0, Double_t & a1, Int_t & ifail, Double_t xmin = 0, Double_t xmax = 0 )

virtualinherited

Least square linear fit without weights.

Fit a straight line (a0 + a1*x) to the data in this graph.

Parameters

[in]	ndata	if ndata<0, fits the logarithm of the graph (used in InitExpo() to set the initial parameter values for a fit with exponential function.
[in]	a0	constant
[in]	a1	slope
[in]	ifail	return parameter indicating the status of the fit (ifail=0, fit is OK)
[in]	xmin,xmax	fitting range

extracted from CERNLIB LLSQ: Translated to C++ by Rene Brun

Definition at line 1961 of file TGraph.cxx.

ls()

void TNamed::ls ( Option_t * option = "" ) const

overridevirtualinherited

List TNamed name and title.

Reimplemented from TObject.

Reimplemented in ROOT::Experimental::XRooFit::xRooBrowser, TVirtualStreamerInfo, TROOT, TStreamerElement, TStreamerBase, TStreamerSTL, TText, TStreamerInfo, TTask, and TNode.

Definition at line 112 of file TNamed.cxx.

MakeZombie()

void TObject::MakeZombie ( )

inlineprotectedinherited

Definition at line 55 of file TObject.h.

MayNotUse()

void TObject::MayNotUse ( const char * method ) const

inherited

Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).

Definition at line 1160 of file TObject.cxx.

Merge()

Int_t TGraphErrors::Merge ( TCollection * li )

overridevirtualinherited

Adds all graphs with errors from the collection to this graph.

Returns the total number of points in the result or -1 in case of an error.

Reimplemented from TGraph.

Definition at line 694 of file TGraphErrors.cxx.

Modify() [1/3]

void TAttFill::Modify ( )

virtualinherited

Change current fill area attributes if necessary.

Definition at line 212 of file TAttFill.cxx.

Modify() [2/3]

void TAttLine::Modify ( )

virtualinherited

Change current line attributes if necessary.

Definition at line 246 of file TAttLine.cxx.

Modify() [3/3]

void TAttMarker::Modify ( )

virtualinherited

Change current marker attributes if necessary.

Definition at line 322 of file TAttMarker.cxx.

ModifyOn() [1/3]

void TAttFill::ModifyOn ( TVirtualPad & pad )

virtualinherited

Change current fill area attributes on speicifed pad.

Definition at line 221 of file TAttFill.cxx.

ModifyOn() [2/3]

void TAttLine::ModifyOn ( TVirtualPad & pad )

virtualinherited

Change current line attributes on specified pad.

Definition at line 255 of file TAttLine.cxx.

ModifyOn() [3/3]

void TAttMarker::ModifyOn ( TVirtualPad & pad )

virtualinherited

Change current marker attributes if necessary on specified pad.

Definition at line 331 of file TAttMarker.cxx.

MovePoints()

void TGraph::MovePoints ( Double_t dx, Double_t dy, Bool_t logx = kFALSE, Bool_t logy = kFALSE )

virtualinherited

Move all graph points on specified values dx,dy If log argument specified, calculation done in logarithmic scale like: new_value = exp( log(old_value) + delta );.

Definition at line 2736 of file TGraph.cxx.

Notify()

Bool_t TObject::Notify ( )

virtualinherited

This method must be overridden to handle object notification (the base implementation is no-op).

Different objects in ROOT use the Notify method for different purposes, in coordination with other objects that call this method at the appropriate time.

For example, TLeaf uses it to load class information; TBranchRef to load contents of referenced branches TBranchRef; most notably, based on Notify, TChain implements a callback mechanism to inform interested parties when it switches to a new sub-tree.

Reimplemented in TMessageHandler, TNotifyLink< Type >, TNotifyLink< RNoCleanupNotifierHelper >, TNotifyLink< ROOT::Detail::TBranchProxy >, TNotifyLink< TTreeReader >, TFileHandler, TSignalHandler, TStdExceptionHandler, TProcessEventTimer, TTimer, TIdleTimer, TSingleShotCleaner, TCollection, TRefTable, TBrowserTimer, TInterruptHandler, TTermInputHandler, TThreadTimer, TGLRedrawTimer, TViewTimer, TGContainerKeyboardTimer, TGContainerScrollTimer, TGInputHandler, TViewUpdateTimer, TPopupDelayTimer, TRepeatTimer, TSBRepeatTimer, TGTextEditHist, TInsCharCom, TDelCharCom, TBreakLineCom, TInsTextCom, TDelTextCom, TBlinkTimer, TTipDelayTimer, TGuiBldDragManagerRepeatTimer, TARInterruptHandler, TASLogHandler, TASInterruptHandler, TASSigPipeHandler, TASInputHandler, TSocketHandler, TTimeOutTimer, TBranchElement, TBranchRef, TLeafObject, TSelector, TTree, TSelectorDraw, TSelectorEntries, TTreeFormula, TTreeFormulaManager, TTreeReader, h1analysis, h1analysisTreeReader, and TSysEvtHandler.

Definition at line 618 of file TObject.cxx.

Obsolete()

void TObject::Obsolete ( const char * method, const char * asOfVers, const char * removedFromVers ) const

inherited

Use this method to declare a method obsolete.

Specify as of which version the method is obsolete and as from which version it will be removed.

Definition at line 1169 of file TObject.cxx.

operator delete() [1/3]

void TObject::operator delete ( void * ptr, size_t size )

inherited

Operator delete for sized deallocation.

Definition at line 1234 of file TObject.cxx.

operator delete() [2/3]

void TObject::operator delete ( void * ptr )

inherited

Operator delete.

Definition at line 1212 of file TObject.cxx.

operator delete() [3/3]

void TObject::operator delete ( void * ptr, void * vp )

inherited

Only called by placement new when throwing an exception.

Definition at line 1266 of file TObject.cxx.

operator delete[]() [1/3]

void TObject::operator delete[] ( void * ptr, size_t size )

inherited

Operator delete [] for sized deallocation.

Definition at line 1245 of file TObject.cxx.

operator delete[]() [2/3]

void TObject::operator delete[] ( void * ptr )

inherited

Operator delete [].

Definition at line 1223 of file TObject.cxx.

operator delete[]() [3/3]

void TObject::operator delete[] ( void * ptr, void * vp )

inherited

Only called by placement new[] when throwing an exception.

Definition at line 1274 of file TObject.cxx.

operator new() [1/2]

void * TObject::operator new ( size_t sz )

inlineinherited

Definition at line 189 of file TObject.h.

operator new() [2/2]

void * TObject::operator new ( size_t sz, void * vp )

inlineinherited

Definition at line 191 of file TObject.h.

operator new[]() [1/2]

void * TObject::operator new[] ( size_t sz )

inlineinherited

Definition at line 190 of file TObject.h.

operator new[]() [2/2]

void * TObject::operator new[] ( size_t sz, void * vp )

inlineinherited

Definition at line 192 of file TObject.h.

Paint()

void TGraph::Paint ( Option_t * chopt = "" )

overridevirtualinherited

Draw this graph with its current attributes.

Reimplemented from TObject.

Definition at line 2007 of file TGraph.cxx.

PaintGraph()

void TGraph::PaintGraph ( Int_t npoints, const Double_t * x, const Double_t * y, Option_t * chopt )

inherited

Draw the (x,y) as a graph.

Definition at line 2016 of file TGraph.cxx.

PaintGrapHist()

void TGraph::PaintGrapHist ( Int_t npoints, const Double_t * x, const Double_t * y, Option_t * chopt )

inherited

Draw the (x,y) as a histogram.

Definition at line 2025 of file TGraph.cxx.

PaintStats()

void TGraph::PaintStats ( TF1 * fit )

virtualinherited

Draw the stats.

Definition at line 2034 of file TGraph.cxx.

Pop()

void TObject::Pop ( )

virtualinherited

Pop on object drawn in a pad to the top of the display list.

I.e. it will be drawn last and on top of all other primitives.

Reimplemented in TPad, TFrame, and TVirtualPad.

Definition at line 640 of file TObject.cxx.

Print()

void TGraphErrors::Print ( Option_t * chopt = "" ) const

overridevirtualinherited

Print graph and errors values.

Reimplemented from TGraph.

Definition at line 723 of file TGraphErrors.cxx.

Read()

Int_t TObject::Read ( const char * name )

virtualinherited

Read contents of object with specified name from the current directory.

First the key with the given name is searched in the current directory, next the key buffer is deserialized into the object. The object must have been created before via the default constructor. See TObject::Write().

Reimplemented in TKeyXML, TBuffer, TKey, and TKeySQL.

Definition at line 673 of file TObject.cxx.

RecursiveRemove()

void TGraph::RecursiveRemove ( TObject * obj )

overridevirtualinherited

Recursively remove object from the list of functions.

Reimplemented from TObject.

Definition at line 2053 of file TGraph.cxx.

RemovePoint() [1/2]

Int_t TGraph::RemovePoint ( )

virtualinherited

Delete point close to the mouse position Returns index of removed point (or -1 if nothing was changed)

Definition at line 2067 of file TGraph.cxx.

RemovePoint() [2/2]

Int_t TGraph::RemovePoint ( Int_t ipoint )

virtualinherited

Delete point number ipoint Returns index of removed point (or -1 if nothing was changed)

Definition at line 2095 of file TGraph.cxx.

ResetAttFill()

void TAttFill::ResetAttFill ( Option_t * option = "" )

virtualinherited

Reset this fill attributes to default values.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 231 of file TAttFill.cxx.

ResetAttLine()

void TAttLine::ResetAttLine ( Option_t * option = "" )

virtualinherited

Reset this line attributes to default values.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 279 of file TAttLine.cxx.

ResetAttMarker()

void TAttMarker::ResetAttMarker ( Option_t * toption = "" )

virtualinherited

Reset this marker attributes to the default values.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 342 of file TAttMarker.cxx.

ResetBit()

void TObject::ResetBit ( UInt_t f )

inlineinherited

Definition at line 203 of file TObject.h.

SaveAs()

void TGraph::SaveAs ( const char * filename = "graph", Option_t * option = "" ) const

overridevirtualinherited

Save the graph as .csv, .tsv or .txt.

In case of any other extension, fall back to TObject::SaveAs

The result can be immediately imported into Excel, gnuplot, Python or whatever, without the needing to install pyroot, etc.

Parameters

filename	the name of the file where to store the graph
option	some tuning options

The file extension defines the delimiter used:

• .csv : comma
• .tsv : tab
• .txt : space

By default file contains lines with (X, Y) coordinates. If errors are present, (X, EX, Y, EY) are written. With asymmetric errors (X, EXL, EXH, Y, EYL, EYH) are stored. If option contains "asroot" string, order of values will match such order in TGraph constructors. So one will get (X, Y, EX, EY) or (X, Y, EXL, EXH, EYL, EYH).

Also one can directly select that kind of errors are stored:

• "errors" - (X, Y, EX, EY) will be stored
• "asymmerrors" - (X, Y, EXL, EXH, EYL, EYH) will be stored
• "noerrors" - just (X, Y) will be stored disregard of graph kind

If option contains "title" a title line is generated with the axis titles.

Reimplemented from TObject.

Definition at line 2134 of file TGraph.cxx.

SaveFillAttributes()

void TAttFill::SaveFillAttributes ( std::ostream & out, const char * name, Int_t coldef = 1, Int_t stydef = 1001 )

virtualinherited

Save fill attributes as C++ statement(s) on output stream out.

Definition at line 240 of file TAttFill.cxx.

SaveHistogramAndFunctions()

void TGraph::SaveHistogramAndFunctions ( std::ostream & out, const char * varname, Option_t * option )

protectedinherited

Save histogram and list of functions of TGraph as C++ statement Used in all TGraph-derived classes.

Definition at line 2251 of file TGraph.cxx.

SaveLineAttributes()

void TAttLine::SaveLineAttributes ( std::ostream & out, const char * name, Int_t coldef = 1, Int_t stydef = 1, Int_t widdef = 1 )

virtualinherited

Save line attributes as C++ statement(s) on output stream out.

Definition at line 289 of file TAttLine.cxx.

SaveMarkerAttributes()

void TAttMarker::SaveMarkerAttributes ( std::ostream & out, const char * name, Int_t coldef = 1, Int_t stydef = 1, Int_t sizdef = 1 )

virtualinherited

Save line attributes as C++ statement(s) on output stream out.

Definition at line 352 of file TAttMarker.cxx.

SavePrimitive()

void TGraphPolar::SavePrimitive ( std::ostream & out, Option_t * option = "" )

overridevirtual

Save primitive as a C++ statement(s) on output stream out.

Reimplemented from TGraphErrors.

Definition at line 219 of file TGraphPolar.cxx.

SavePrimitiveConstructor()

void TObject::SavePrimitiveConstructor ( std::ostream & out, TClass * cl, const char * variable_name, const char * constructor_agrs = "", Bool_t empty_line = kTRUE )

staticprotectedinherited

Save object constructor in the output stream "out".

Can be used as first statement when implementing SavePrimitive() method for the object

Definition at line 777 of file TObject.cxx.

SavePrimitiveDraw()

void TObject::SavePrimitiveDraw ( std::ostream & out, const char * variable_name, Option_t * option = nullptr )

staticprotectedinherited

Save invocation of primitive Draw() method Skipped if option contains "nodraw" string.

Definition at line 845 of file TObject.cxx.

SavePrimitiveNameTitle()

void TNamed::SavePrimitiveNameTitle ( std::ostream & out, const char * variable_name )

protectedinherited

Save object name and title into the output stream "out".

Definition at line 135 of file TNamed.cxx.

SavePrimitiveVector()

TString TObject::SavePrimitiveVector ( std::ostream & out, const char * prefix, Int_t len, Double_t * arr, Int_t flag = 0 )

staticprotectedinherited

Save array in the output stream "out" as vector.

Create unique variable name based on prefix value Returns name of vector which can be used in constructor or in other places of C++ code If flag === kTRUE, just add empty line If flag === 111, check if array is empty and return nullptr or <vectorname>.data()

Definition at line 796 of file TObject.cxx.

Scale()

void TGraphErrors::Scale ( Double_t c1 = 1., Option_t * option = "y" )

overridevirtualinherited

Multiply the values and errors of a TGraphErrors by a constant c1.

If option contains "x" the x values and errors are scaled If option contains "y" the y values and errors are scaled If option contains "xy" both x and y values and errors are scaled

Reimplemented from TGraph.

Definition at line 755 of file TGraphErrors.cxx.

Set()

void TGraph::Set ( Int_t n )

virtualinherited

Set number of points in the graph Existing coordinates are preserved New coordinates above fNpoints are preset to 0.

Definition at line 2315 of file TGraph.cxx.

SetBit() [1/2]

void TObject::SetBit ( UInt_t f )

inlineinherited

Definition at line 202 of file TObject.h.

SetBit() [2/2]

void TObject::SetBit ( UInt_t f, Bool_t set )

inherited

Set or unset the user status bits as specified in f.

Definition at line 888 of file TObject.cxx.

SetDrawOption()

void TObject::SetDrawOption ( Option_t * option = "" )

virtualinherited

Set drawing option for object.

This option only affects the drawing style and is stored in the option field of the TObjOptLink supporting a TPad's primitive list (TList). Note that it does not make sense to call object.SetDrawOption(option) before having called object.Draw().

Reimplemented in TSystemDirectory, TSystemFile, TPad, TGFrame, TAxis, TBrowser, TPaveStats, TGedFrame, TRootBrowserLite, and RooPlot.

Definition at line 871 of file TObject.cxx.

SetDtorOnly()

void TObject::SetDtorOnly ( void * obj )

staticinherited

Set destructor only flag.

Definition at line 1204 of file TObject.cxx.

SetEditable()

void TGraph::SetEditable ( Bool_t editable = kTRUE )

virtualinherited

if editable=kFALSE, the graph cannot be modified with the mouse by default a TGraph is editable

Definition at line 2339 of file TGraph.cxx.

SetFillAttributes()

void TAttFill::SetFillAttributes ( )

virtualinherited

Invoke the DialogCanvas Fill attributes.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 251 of file TAttFill.cxx.

SetFillColor() [1/2]

virtual void TAttFill::SetFillColor ( Color_t fcolor )

inlinevirtualinherited

Set the fill area color.

Reimplemented in TVirtualX, TGQuartz, TGWin32, TGWin32VirtualXProxy, TGX11, TPDF, TPostScript, TSVG, TTeXDump, TSpider, and TGraphMultiErrors.

Definition at line 40 of file TAttFill.h.

SetFillColor() [2/2]

void TAttFill::SetFillColor ( TColorNumber lcolor )

inherited

Set a fill color.

Definition at line 270 of file TAttFill.cxx.

SetFillColorAlpha()

void TAttFill::SetFillColorAlpha ( Color_t fcolor, Float_t falpha )

virtualinherited

Set a transparent fill color.

Parameters

fcolor	defines the fill color
falpha	defines the percentage of opacity from 0. (fully transparent) to 1. (fully opaque).

Note

falpha is ignored (treated as 1) if the TCanvas has no GL support activated.

Reimplemented in TGraphMultiErrors.

Definition at line 262 of file TAttFill.cxx.

SetFillStyle()

virtual void TAttFill::SetFillStyle ( Style_t fstyle )

inlinevirtualinherited

Set the fill area style.

Reimplemented in TGraphMultiErrors, TPad, TSpider, TVirtualX, TGQuartz, TGWin32, TGWin32VirtualXProxy, and TGX11.

Definition at line 42 of file TAttFill.h.

SetHighlight()

void TGraph::SetHighlight ( Bool_t set = kTRUE )

virtualinherited

Set highlight (enable/disable) mode for the graph by default highlight mode is disable.

Definition at line 2349 of file TGraph.cxx.

SetHistogram()

void TGraph::SetHistogram ( TH1F * h )

virtualinherited

Set the histogram underlying the TGraph. This transfers the ownership of h to the TGraph. The preexisting fHistogram will be deleted.

Definition at line 2360 of file TGraph.cxx.

SetLineAttributes()

void TAttLine::SetLineAttributes ( )

virtualinherited

Invoke the DialogCanvas Line attributes.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 306 of file TAttLine.cxx.

SetLineColor() [1/2]

virtual void TAttLine::SetLineColor ( Color_t lcolor )

inlinevirtualinherited

Set the line color.

Reimplemented in TEveTrackList, ROOT::Experimental::REveTrackList, TVirtualX, TGQuartz, TGWin32, TGWin32VirtualXProxy, TGX11, TPDF, TPostScript, TSVG, TTeXDump, TEveLine, TEveStraightLineSet, ROOT::Experimental::REveLine, ROOT::Experimental::REveStraightLineSet, TParallelCoordRange, TSpider, TGraphMultiErrors, TGeoVolume, and TGeoVolumeMulti.

Definition at line 44 of file TAttLine.h.

SetLineColor() [2/2]

void TAttLine::SetLineColor ( TColorNumber lcolor )

inherited

Definition at line 322 of file TAttLine.cxx.

SetLineColorAlpha()

void TAttLine::SetLineColorAlpha ( Color_t lcolor, Float_t lalpha )

virtualinherited

Set a transparent line color.

Parameters

lcolor	defines the line color
lalpha	defines the percentage of opacity from 0. (fully transparent) to 1. (fully opaque).

Note

lalpha is ignored (treated as 1) if the TCanvas has no GL support activated.

Reimplemented in TGraphMultiErrors.

Definition at line 317 of file TAttLine.cxx.

SetLineStyle()

virtual void TAttLine::SetLineStyle ( Style_t lstyle )

inlinevirtualinherited

Set the line style.

Reimplemented in TVirtualX, TGQuartz, TGWin32, TGWin32VirtualXProxy, TGX11, TPDF, TPostScript, TSVG, TTeXDump, TGraphMultiErrors, TGeoVolume, TGeoVolumeMulti, TEveLine, ROOT::Experimental::REveLine, TEveTrackList, ROOT::Experimental::REveTrackList, and TSpider.

Definition at line 46 of file TAttLine.h.

SetLineWidth()

virtual void TAttLine::SetLineWidth ( Width_t lwidth )

inlinevirtualinherited

Set the line width.

Reimplemented in TPDF, TPostScript, TSVG, TTeXDump, TGraphMultiErrors, TGeoVolume, TGeoVolumeMulti, TEveLine, ROOT::Experimental::REveLine, TEveTrackList, ROOT::Experimental::REveTrackList, TParallelCoordRange, TSpider, TVirtualX, TGQuartz, TGWin32, TGWin32VirtualXProxy, TGX11, and TPaletteAxis.

Definition at line 47 of file TAttLine.h.

SetMarkerAttributes()

void TAttMarker::SetMarkerAttributes ( )

virtualinherited

Invoke the DialogCanvas Marker attributes.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 365 of file TAttMarker.cxx.

SetMarkerColor() [1/2]

virtual void TAttMarker::SetMarkerColor ( Color_t mcolor = 1 )

inlinevirtualinherited

Set the marker color.

Reimplemented in TEveTrackList, ROOT::Experimental::REveTrackList, TVirtualX, TGQuartz, TGWin32, TGWin32VirtualXProxy, TGX11, TPDF, TPostScript, TSVG, TTeXDump, TEveLine, TEvePointSet, ROOT::Experimental::REveLine, ROOT::Experimental::REvePointSet, TEvePointSetArray, and ROOT::Experimental::REvePointSetArray.

Definition at line 41 of file TAttMarker.h.

SetMarkerColor() [2/2]

void TAttMarker::SetMarkerColor ( TColorNumber lcolor )

inherited

Definition at line 381 of file TAttMarker.cxx.

SetMarkerColorAlpha()

void TAttMarker::SetMarkerColorAlpha ( Color_t mcolor, Float_t malpha )

virtualinherited

Set a transparent marker color.

Parameters

mcolor	defines the marker color
malpha	defines the percentage of opacity from 0. (fully transparent) to 1. (fully opaque).

Note

malpha is ignored (treated as 1) if the TCanvas has no GL support activated.

Definition at line 376 of file TAttMarker.cxx.

SetMarkerSize()

virtual void TAttMarker::SetMarkerSize ( Size_t msize = 1 )

inlinevirtualinherited

Set the marker size.

Note that the marker styles number 1 6 and 7 (the dots), cannot be scaled. They are meant to be very fast to draw and are always drawn with the same number of pixels; therefore this method does not apply on them.

Reimplemented in TVirtualX, TGQuartz, TGWin32, TGWin32VirtualXProxy, TGX11, TTeXDump, TEvePointSet, TEvePointSetArray, ROOT::Experimental::REvePointSet, ROOT::Experimental::REvePointSetArray, TEveTrackList, and ROOT::Experimental::REveTrackList.

Definition at line 48 of file TAttMarker.h.

SetMarkerStyle()

virtual void TAttMarker::SetMarkerStyle ( Style_t mstyle = 1 )

inlinevirtualinherited

Set the marker style.

Reimplemented in TVirtualX, TGQuartz, TGWin32, TGWin32VirtualXProxy, TGX11, TEvePointSet, TEvePointSetArray, ROOT::Experimental::REvePointSet, ROOT::Experimental::REvePointSetArray, TEveTrackList, and ROOT::Experimental::REveTrackList.

Definition at line 43 of file TAttMarker.h.

SetMaximum()

void TGraphPolar::SetMaximum ( Double_t maximum = 1 )

inlineoverridevirtual

Set the maximum of the graph.

Reimplemented from TGraph.

Definition at line 49 of file TGraphPolar.h.

SetMaxPolar()

void TGraphPolar::SetMaxPolar

(

Double_t

maximum = 6.28318530717958623

)

Set maximum Polar.

Definition at line 125 of file TGraphPolar.cxx.

SetMaxRadial()

void TGraphPolar::SetMaxRadial

(

Double_t

maximum = 1

)

Set maximum radial at the intersection of the positive X axis part and the circle.

Definition at line 134 of file TGraphPolar.cxx.

SetMinimum()

void TGraphPolar::SetMinimum ( Double_t minimum = 0 )

inlineoverridevirtual

Set the minimum of the graph.

Reimplemented from TGraph.

Definition at line 50 of file TGraphPolar.h.

SetMinPolar()

void TGraphPolar::SetMinPolar

(

Double_t

minimum = 0

)

Set minimum Polar.

Definition at line 142 of file TGraphPolar.cxx.

SetMinRadial()

void TGraphPolar::SetMinRadial

(

Double_t

minimum = 0

)

Set minimum radial in the center of the circle.

Definition at line 150 of file TGraphPolar.cxx.

SetName()

void TGraph::SetName ( const char * name = "" )

overridevirtualinherited

Set graph name.

Reimplemented from TNamed.

Definition at line 2426 of file TGraph.cxx.

SetNameTitle()

void TGraph::SetNameTitle ( const char * name = "", const char * title = "" )

overridevirtualinherited

Set graph name and title.

Reimplemented from TNamed.

Definition at line 2462 of file TGraph.cxx.

SetObjectStat()

void TObject::SetObjectStat ( Bool_t stat )

staticinherited

Turn on/off tracking of objects in the TObjectTable.

Definition at line 1188 of file TObject.cxx.

SetOption()

virtual void TGraph::SetOption ( Option_t * option = " " )

inlinevirtualinherited

Definition at line 189 of file TGraph.h.

SetOptionAxis()

void TGraphPolar::SetOptionAxis ( Bool_t opt )

inline

Definition at line 53 of file TGraphPolar.h.

SetPoint()

void TGraph::SetPoint ( Int_t i, Double_t x, Double_t y )

virtualinherited

Set x and y values for point number i.

Definition at line 2387 of file TGraph.cxx.

SetPointError() [1/2]

void TGraphErrors::SetPointError ( Double_t ex, Double_t ey )

virtualinherited

Set ex and ey values for point pointed by the mouse.

Definition at line 772 of file TGraphErrors.cxx.

SetPointError() [2/2]

void TGraphErrors::SetPointError ( Int_t i, Double_t ex, Double_t ey )

virtualinherited

Set ex and ey values for point number i.

Definition at line 805 of file TGraphErrors.cxx.

SetPointX()

void TGraph::SetPointX ( Int_t i, Double_t x )

virtualinherited

Set x value for point i.

Definition at line 2411 of file TGraph.cxx.

SetPointY()

void TGraph::SetPointY ( Int_t i, Double_t y )

virtualinherited

Set y value for point i.

Definition at line 2419 of file TGraph.cxx.

SetPolargram()

void TGraphPolar::SetPolargram ( TGraphPolargram * p )

inline

Definition at line 54 of file TGraphPolar.h.

SetStats()

void TGraph::SetStats ( Bool_t stats = kTRUE )

virtualinherited

Set statistics option on/off.

By default, the statistics box is drawn. The paint options can be selected via gStyle->SetOptStat. This function sets/resets the kNoStats bit in the graph object. It has priority over the Style option.

Definition at line 2476 of file TGraph.cxx.

SetTitle()

void TGraph::SetTitle ( const char * title = "" )

overridevirtualinherited

Change (i.e.

set) the title

if title is in the form stringt;stringx;stringy;stringz the graph title is set to stringt, the x axis title to stringx, the y axis title to stringy, and the z axis title to stringz.

To insert the character ; in one of the titles, one should use #; or #semicolon.

Reimplemented from TNamed.

Definition at line 2442 of file TGraph.cxx.

SetUniqueID()

void TObject::SetUniqueID ( UInt_t uid )

virtualinherited

Set the unique object id.

Definition at line 899 of file TObject.cxx.

ShrinkAndCopy()

Double_t ** TGraph::ShrinkAndCopy ( Int_t size, Int_t oend )

protectedinherited

if size*2 <= fMaxSize allocate new arrays of size points, copy points [0,oend).

Return newarray (passed or new instance if it was zero and allocations are needed)

Definition at line 2498 of file TGraph.cxx.

Sizeof()

Int_t TNamed::Sizeof ( ) const

virtualinherited

Return size of the TNamed part of the TObject.

Reimplemented in TSQLFile, TXMLFile, TDirectory, TDirectoryFile, TFile, and TKey.

Definition at line 182 of file TNamed.cxx.

Sort()

void TGraph::Sort ( Bool_t(*)(const TGraph *, Int_t, Int_t) greaterfunc = &TGraph::CompareX, Bool_t ascending = kTRUE, Int_t low = 0, Int_t high = -1111 )

virtualinherited

Sorts the points of this TGraph using in-place quicksort (see e.g.

older glibc). To compare two points the function parameter greaterfunc is used (see TGraph::CompareX for an example of such a method, which is also the default comparison function for Sort). After the sort, greaterfunc(this, i, j) will return kTRUE for all i>j if ascending == kTRUE, and kFALSE otherwise.

The last two parameters are used for the recursive quick sort, stating the range to be sorted

Examples:

// sort points along x axis
graph->Sort();
// sort points along their distance to origin
graph->Sort(&TGraph::CompareRadius);
 
Bool_t CompareErrors(const TGraph* gr, Int_t i, Int_t j) {
  const TGraphErrors* ge=(const TGraphErrors*)gr;
  return (ge->GetEY()[i]>ge->GetEY()[j]); }
// sort using the above comparison function, largest errors first
graph->Sort(&CompareErrors, kFALSE);

Definition at line 2531 of file TGraph.cxx.

Streamer()

void TGraphPolar::Streamer ( TBuffer & b )

overridevirtual

Stream an object of class TGraphErrors.

Reimplemented from TGraphErrors.

StreamerNVirtual()

void TGraphPolar::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b )

inline

Definition at line 58 of file TGraphPolar.h.

SwapPoints()

void TGraphErrors::SwapPoints ( Int_t pos1, Int_t pos2 )

overrideprotectedvirtualinherited

Swap points.

Reimplemented from TGraph.

Definition at line 859 of file TGraphErrors.cxx.

SwapValues()

void TGraph::SwapValues ( Double_t * arr, Int_t pos1, Int_t pos2 )

staticprotectedinherited

Swap values.

Definition at line 2656 of file TGraph.cxx.

SysError()

void TObject::SysError ( const char * location, const char * fmt, ... ) const

virtualinherited

Issue system error message.

Use "location" to specify the method where the system error occurred. Accepts standard printf formatting arguments.

Definition at line 1112 of file TObject.cxx.

TestBit()

R__ALWAYS_INLINE Bool_t TObject::TestBit ( UInt_t f ) const

inlineinherited

Definition at line 204 of file TObject.h.

TestBits()

Int_t TObject::TestBits ( UInt_t f ) const

inlineinherited

Definition at line 205 of file TObject.h.

UpdateArrays()

void TGraphErrors::UpdateArrays ( const std::vector< Int_t > & sorting_indices, Int_t numSortedPoints, Int_t low )

overrideprotectedvirtualinherited

Update the fX, fY, fEX, and fEY arrays with the sorted values.

Reimplemented from TGraph.

Definition at line 869 of file TGraphErrors.cxx.

UseCurrentStyle()

void TGraph::UseCurrentStyle ( )

overridevirtualinherited

Set current style settings in this graph This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.

Reimplemented from TObject.

Definition at line 2668 of file TGraph.cxx.

Warning()

void TObject::Warning ( const char * location, const char * fmt, ... ) const

virtualinherited

Issue warning message.

Use "location" to specify the method where the warning occurred. Accepts standard printf formatting arguments.

Definition at line 1084 of file TObject.cxx.

Write() [1/2]

Int_t TObject::Write ( const char * name = nullptr, Int_t option = 0, Int_t bufsize = 0 )

virtualinherited

Write this object to the current directory.

For more see the const version of this method.

Reimplemented in TSQLFile, TXMLFile, TDirectory, TBuffer, ROOT::TBufferMergerFile, TDirectoryFile, TFile, TParallelMergingFile, TCollection, TMap, and TTree.

Definition at line 989 of file TObject.cxx.

Write() [2/2]

Int_t TObject::Write ( const char * name = nullptr, Int_t option = 0, Int_t bufsize = 0 ) const

virtualinherited

Write this object to the current directory.

The data structure corresponding to this object is serialized. The corresponding buffer is written to the current directory with an associated key with name "name".

Writing an object to a file involves the following steps:

• Creation of a support TKey object in the current directory. The TKey object creates a TBuffer object.
• The TBuffer object is filled via the class::Streamer function.
• If the file is compressed (default) a second buffer is created to hold the compressed buffer.
• Reservation of the corresponding space in the file by looking in the TFree list of free blocks of the file.
• The buffer is written to the file.

Bufsize can be given to force a given buffer size to write this object. By default, the buffersize will be taken from the average buffer size of all objects written to the current file so far.

If a name is specified, it will be the name of the key. If name is not given, the name of the key will be the name as returned by GetName().

The option can be a combination of: kSingleKey, kOverwrite or kWriteDelete Using the kOverwrite option a previous key with the same name is overwritten. The previous key is deleted before writing the new object. Using the kWriteDelete option a previous key with the same name is deleted only after the new object has been written. This option is safer than kOverwrite but it is slower. NOTE: Neither kOverwrite nor kWriteDelete reduces the size of a TFile– the space is simply freed up to be overwritten; in the case of a TTree, it is more complicated. If one opens a TTree, appends some entries, then writes it out, the behaviour is effectively the same. If, however, one creates a new TTree and writes it out in this way, only the metadata is replaced, effectively making the old data invisible without deleting it. TTree::Delete() can be used to mark all disk space occupied by a TTree as free before overwriting its metadata this way. The kSingleKey option is only used by TCollection::Write() to write a container with a single key instead of each object in the container with its own key.

An object is read from the file into memory via TKey::Read() or via TObject::Read().

The function returns the total number of bytes written to the file. It returns 0 if the object cannot be written.

Reimplemented in TSQLFile, TXMLFile, TDirectory, TBuffer, TDirectoryFile, TFile, TParallelMergingFile, TCollection, TMap, and TTree.

Definition at line 964 of file TObject.cxx.

Zero()

void TGraph::Zero ( Int_t & k, Double_t AZ, Double_t BZ, Double_t E2, Double_t & X, Double_t & Y, Int_t maxiterations )

inherited

Find zero of a continuous function.

This function finds a real zero of the continuous real function Y(X) in a given interval (A,B). See accompanying notes for details of the argument list and calling sequence

Definition at line 2762 of file TGraph.cxx.

Member Data Documentation

fBits

UInt_t TObject::fBits

privateinherited

bit field status word

Definition at line 47 of file TObject.h.

fEX

Double_t* TGraphErrors::fEX {nullptr}

protectedinherited

[fNpoints] array of X errors

Definition at line 29 of file TGraphErrors.h.

fEY

Double_t* TGraphErrors::fEY {nullptr}

protectedinherited

[fNpoints] array of Y errors

Definition at line 30 of file TGraphErrors.h.

fFillColor

Color_t TAttFill::fFillColor

protectedinherited

Fill area color.

Definition at line 24 of file TAttFill.h.

fFillStyle

Style_t TAttFill::fFillStyle

protectedinherited

Fill area style.

Definition at line 25 of file TAttFill.h.

fFunctions

TList* TGraph::fFunctions

protectedinherited

Pointer to list of functions (fits and user)

Definition at line 49 of file TGraph.h.

fgDtorOnly

Longptr_t TObject::fgDtorOnly = 0

staticprivateinherited

object for which to call dtor only (i.e. no delete)

Definition at line 49 of file TObject.h.

fgObjectStat

Bool_t TObject::fgObjectStat = kTRUE

staticprivateinherited

if true keep track of objects in TObjectTable

Definition at line 50 of file TObject.h.

fHistogram

TH1F* TGraph::fHistogram

protectedinherited

Pointer to histogram used for drawing axis.

Definition at line 50 of file TGraph.h.

fLineColor

Color_t TAttLine::fLineColor

protectedinherited

Line color.

Definition at line 24 of file TAttLine.h.

fLineStyle

Style_t TAttLine::fLineStyle

protectedinherited

Line style.

Definition at line 25 of file TAttLine.h.

fLineWidth

Width_t TAttLine::fLineWidth

protectedinherited

Line width.

Definition at line 26 of file TAttLine.h.

fMarkerColor

Color_t TAttMarker::fMarkerColor

protectedinherited

Marker color.

Definition at line 24 of file TAttMarker.h.

fMarkerSize

Size_t TAttMarker::fMarkerSize

protectedinherited

Marker size.

Definition at line 26 of file TAttMarker.h.

fMarkerStyle

Style_t TAttMarker::fMarkerStyle

protectedinherited

Marker style.

Definition at line 25 of file TAttMarker.h.

fMaximum

Double_t TGraph::fMaximum

protectedinherited

Maximum value for plotting along y.

Definition at line 52 of file TGraph.h.

fMaxSize

Int_t TGraph::fMaxSize

protectedinherited

!Current dimension of arrays fX and fY

Definition at line 45 of file TGraph.h.

fMinimum

Double_t TGraph::fMinimum

protectedinherited

Minimum value for plotting along y.

Definition at line 51 of file TGraph.h.

fName

TString TNamed::fName

protectedinherited

Definition at line 32 of file TNamed.h.

fNpoints

Int_t TGraph::fNpoints

protectedinherited

Number of points <= fMaxSize.

Definition at line 46 of file TGraph.h.

fOption

TString TGraph::fOption

protectedinherited

Options used for drawing the graph.

Definition at line 53 of file TGraph.h.

fOptionAxis

Bool_t TGraphPolar::fOptionAxis

private

Force drawing of new coord system.

Definition at line 26 of file TGraphPolar.h.

fPolargram

TGraphPolargram* TGraphPolar::fPolargram

protected

The polar coordinates system.

Definition at line 29 of file TGraphPolar.h.

fTitle

TString TNamed::fTitle

protectedinherited

Definition at line 33 of file TNamed.h.

fUniqueID

UInt_t TObject::fUniqueID

privateinherited

object unique identifier

Definition at line 46 of file TObject.h.

fX

Double_t* TGraph::fX

protectedinherited

[fNpoints] array of X points

Definition at line 47 of file TGraph.h.

fXpol

Double_t* TGraphPolar::fXpol

protected

[fNpoints] points in polar coordinates

Definition at line 30 of file TGraphPolar.h.

fY

Double_t* TGraph::fY

protectedinherited

[fNpoints] array of Y points

Definition at line 48 of file TGraph.h.

fYpol

Double_t* TGraphPolar::fYpol

protected

[fNpoints] points in polar coordinates

Definition at line 31 of file TGraphPolar.h.

---

The documentation for this class was generated from the following files:

• graf2d/graf/inc/TGraphPolar.h
• graf2d/graf/src/TGraphPolar.cxx