A RooCurve is a one-dimensional graphical representation of a real-valued function.

A curve is approximated by straight line segments with end points chosen to give a "good" approximation to the true curve. The goodness of the approximation is controlled by a precision and a resolution parameter.

A RooCurve derives from TGraph, so it can either be drawn as a line (default) or as points:

RooPlot *p = y.plotOn(x.frame());
p->getAttMarker("curve_y")->SetMarkerStyle(20);
p->setDrawOptions("curve_y","PL");
p->Draw();

To retrieve a RooCurve from a RooPlot, use RooPlot::getCurve().

Definition at line 32 of file RooCurve.h.

Public Types
enum	WingMode { NoWings =0 , Straight =1 , Extended =2 }

Public Types inherited from TGraph
enum	EStatusBits { kNoStats = BIT(9) , kClipFrame = BIT(10) , kResetHisto = BIT(17) , kNotEditable = BIT(18) , kIsSortedX = BIT(19) , kIsHighlight = BIT(20) }

Public Types inherited from TObject
enum	{ kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff }

enum	{ kSingleKey = BIT(0) , kOverwrite = BIT(1) , kWriteDelete = BIT(2) }

enum	EDeprecatedStatusBits { kObjInCanvas = BIT(3) }

enum	EStatusBits { kCanDelete = BIT(0) , kMustCleanup = BIT(3) , kIsReferenced = BIT(4) , kHasUUID = BIT(5) , kCannotPick = BIT(6) , kNoContextMenu = BIT(8) , kInvalidObject = BIT(13) }

Public Types inherited from RooPrintable
enum	ContentsOption { kName =1 , kClassName =2 , kValue =4 , kArgs =8 , kExtras =16 , kAddress =32 , kTitle =64 , kCollectionHeader =128 }

enum	StyleOption { kInline =1 , kSingleLine =2 , kStandard =3 , kVerbose =4 , kTreeStructure =5 }

Public Member Functions
	RooCurve ()
	Default constructor.

	RooCurve (const char name, const char title, const RooAbsFunc &func, Double_t xlo, Double_t xhi, UInt_t minPoints, Double_t prec=1e-3, Double_t resolution=1e-3, Bool_t shiftToZero=kFALSE, WingMode wmode=Extended, Int_t nEvalError=-1, Int_t doEEVal=kFALSE, Double_t eeVal=0)
	Create a 1-dim curve of the value of the specified real-valued expression as a function of x.

	RooCurve (const char name, const char title, const RooCurve &c1, const RooCurve &c2, Double_t scale1=1., Double_t scale2=1.)
	Constructor of a curve as sum of two other curves.

	RooCurve (const RooAbsReal &func, RooAbsRealLValue &x, Double_t xlo, Double_t xhi, Int_t xbins, Double_t scaleFactor=1, const RooArgSet *normVars=0, Double_t prec=1e-3, Double_t resolution=1e-3, Bool_t shiftToZero=kFALSE, WingMode wmode=Extended, Int_t nEvalError=-1, Int_t doEEVal=kFALSE, Double_t eeVal=0, Bool_t showProgress=kFALSE)
	Create a 1-dim curve of the value of the specified real-valued expression as a function of x.

virtual	~RooCurve ()
	Destructor.

void	addPoint (Double_t x, Double_t y)
	Add a point with the specified coordinates. Update our y-axis limits.

Double_t	average (Double_t lo, Double_t hi) const
	Return average curve value in [xFirst,xLast] by integrating curve between points and dividing by xLast-xFirst.

Double_t	chiSquare (const RooHist &hist, int nFitParam) const
	Calculate the chi^2/NDOF of this curve with respect to the histogram 'hist' accounting nFitParam floating parameters in case the curve was the result of a fit.

Int_t	findPoint (Double_t value, Double_t tolerance=1e-10) const
	Find the nearest point to xvalue.

Double_t	getFitRangeBinW () const
	Get the bin width associated with this plotable object.

Double_t	getFitRangeNEvt () const
	Return the number of events associated with the plotable object, it is always 1 for curves.

Double_t	getFitRangeNEvt (Double_t xlo, Double_t xhi) const
	Return the number of events associated with the plotable object, in the given range.

Double_t	interpolate (Double_t x, Double_t tolerance=1e-10) const
	Return linearly interpolated value of curve at xvalue.

Bool_t	isIdentical (const RooCurve &other, Double_t tol=1e-6, bool verbose=true) const
	Return true if curve is identical to other curve allowing for given absolute tolerance on each point compared point.

RooCurve *	makeErrorBand (const std::vector< RooCurve * > &plusVar, const std::vector< RooCurve * > &minusVar, const TMatrixD &V, Double_t Z=1) const
	Construct filled RooCurve represented error band represent the error added in quadrature defined by the curves arguments plusVar and minusVar corresponding to one-sigma variations of each parameter.

RooCurve *	makeErrorBand (const std::vector< RooCurve * > &variations, Double_t Z=1) const
	Construct filled RooCurve represented error band that captures alpha% of the variations of the curves passed through argument variations, where the percentage alpha corresponds to the central interval fraction of a significance Z.

virtual void	Print (Option_t *options=0) const
	Print graph values.

virtual void	printClassName (std::ostream &os) const
	Print the class name of this curve.

virtual void	printMultiline (std::ostream &os, Int_t contents, Bool_t verbose=kFALSE, TString indent="") const
	Print the details of this curve.

virtual void	printName (std::ostream &os) const
	Print name of object.

virtual void	printTitle (std::ostream &os) const
	Print the title of this curve.

Public Member Functions inherited from TGraph
	TGraph ()
	Graph default constructor.

	TGraph (const char filename, const char format="%lg %lg", Option_t *option="")
	Graph constructor reading input from filename.

	TGraph (const TF1 f, Option_t option="")
	Graph constructor importing its parameters from the TF1 object passed as argument.

	TGraph (const TGraph &gr)
	Copy constructor for this graph.

	TGraph (const TH1 *h)
	Graph constructor importing its parameters from the TH1 object passed as argument.

	TGraph (const TVectorD &vx, const TVectorD &vy)
	Graph constructor with two vectors of doubles in input A graph is build with the X coordinates taken from vx and Y coord from vy The number of points in the graph is the minimum of number of points in vx and vy.

	TGraph (const TVectorF &vx, const TVectorF &vy)
	Graph constructor with two vectors of floats in input A graph is build with the X coordinates taken from vx and Y coord from vy The number of points in the graph is the minimum of number of points in vx and vy.

	TGraph (Int_t n)
	Constructor with only the number of points set the arrays x and y will be set later.

	TGraph (Int_t n, const Double_t x, const Double_t y)
	Graph normal constructor with doubles.

	TGraph (Int_t n, const Float_t x, const Float_t y)
	Graph normal constructor with floats.

	TGraph (Int_t n, const Int_t x, const Int_t y)
	Graph normal constructor with ints.

virtual	~TGraph ()
	Graph default destructor.

virtual void	AddPoint (Double_t x, Double_t y)
	Append a new point to the graph.

virtual void	Apply (TF1 *f)
	Apply function f to all the data points f may be a 1-D function TF1 or 2-d function TF2 The Y values of the graph are replaced by the new values computed using the function.

virtual void	Browse (TBrowser *b)
	Browse.

virtual Double_t	Chisquare (TF1 f1, Option_t option="") const
	Return the chisquare of this graph with respect to f1.

virtual void	ComputeRange (Double_t &xmin, Double_t &ymin, Double_t &xmax, Double_t &ymax) const
	Compute the x/y range of the points in this graph.

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Compute distance from point px,py to a graph.

virtual void	Draw (Option_t *chopt="")
	Draw this graph with its current attributes.

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 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	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	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 TObject *	FindObject (const char *name) const
	Search object named name in the list of functions.

virtual TObject *	FindObject (const TObject *obj) const
	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 function with name 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.

Bool_t	GetEditable () const
	Return kTRUE if kNotEditable bit is not set, kFALSE otherwise.

virtual Double_t	GetErrorX (Int_t bin) const
	It always returns a negative value. Real implementation in TGraphErrors.

virtual Double_t	GetErrorXhigh (Int_t bin) const
	It always returns a negative value.

virtual Double_t	GetErrorXlow (Int_t bin) const
	It always returns a negative value.

virtual Double_t	GetErrorY (Int_t bin) const
	It always returns a negative value. Real implementation in TGraphErrors.

virtual Double_t	GetErrorYhigh (Int_t bin) const
	It always returns a negative value.

virtual Double_t	GetErrorYlow (Int_t bin) const
	It always returns a negative value.

virtual Double_t *	GetEX () const

virtual Double_t *	GetEXhigh () const

virtual Double_t *	GetEXhighd () const

virtual Double_t *	GetEXlow () const

virtual Double_t *	GetEXlowd () const

virtual Double_t *	GetEY () const

virtual Double_t *	GetEYhigh () const

virtual Double_t *	GetEYhighd () const

virtual Double_t *	GetEYlow () const

virtual Double_t *	GetEYlowd () const

TF1 *	GetFunction (const char *name) const
	Return pointer to function with name.

TH1F *	GetHistogram () const
	Returns a pointer to the histogram used to draw the axis Takes into account the two following cases.

TList *	GetListOfFunctions () const

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

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Implementation to get information on point of graph at cursor position Adapted from class TH1.

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.

virtual Double_t	GetRMS (Int_t axis=1) const
	Return RMS of X (axis=1) or Y (axis=2)

Double_t *	GetX () const

TAxis *	GetXaxis () const
	Get x axis of the graph.

Double_t *	GetY () const

TAxis *	GetYaxis () const
	Get y axis of the graph.

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 Double_t	Integral (Int_t first=0, Int_t last=-1) const
	Integrate the TGraph data within a given (index) range.

virtual Bool_t	IsEditable () const

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.

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.

virtual Int_t	Merge (TCollection *list)
	Adds all graphs from the collection to this graph.

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 );.

TGraph &	operator= (const TGraph &)
	Equal operator for this graph.

virtual void	Paint (Option_t *chopt="")
	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	RecursiveRemove (TObject *obj)
	Recursively remove object from the list of functions.

virtual Int_t	RemovePoint ()
	Delete point close to the mouse position.

virtual Int_t	RemovePoint (Int_t ipoint)
	Delete point number ipoint.

virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save primitive as a C++ statement(s) on output stream out.

virtual void	Scale (Double_t c1=1., Option_t *option="y")
	Multiply the values of a TGraph 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.

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	SetHighlight (Bool_t set=kTRUE)
	Set highlight (enable/disble) mode for the graph by default highlight mode is disable.

virtual void	SetHistogram (TH1F *h)

virtual void	SetMaximum (Double_t maximum=-1111)
	Set the maximum of the graph.

virtual void	SetMinimum (Double_t minimum=-1111)
	Set the minimum of the graph.

virtual void	SetName (const char *name="")
	Set graph name.

virtual void	SetNameTitle (const char name="", const char title="")
	Set graph name and title.

virtual void	SetPoint (Int_t i, Double_t x, Double_t y)
	Set x and y 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.

virtual void	SetStats (Bool_t stats=kTRUE)
	Set statistics option on/off.

virtual void	SetTitle (const char *title="")
	Change (i.e.

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.

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

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.

Public Member Functions inherited from TNamed
	TNamed ()

	TNamed (const char name, const char title)

	TNamed (const TNamed &named)
	TNamed copy ctor.

	TNamed (const TString &name, const TString &title)

virtual	~TNamed ()
	TNamed destructor.

virtual void	Clear (Option_t *option="")
	Set name and title to empty strings ("").

virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility.

virtual Int_t	Compare (const TObject *obj) const
	Compare two TNamed objects.

virtual void	Copy (TObject &named) const
	Copy this to obj.

virtual void	FillBuffer (char *&buffer)
	Encode TNamed into output buffer.

virtual const char *	GetName () const
	Returns name of object.

virtual const char *	GetTitle () const
	Returns title of object.

virtual ULong_t	Hash () const
	Return hash value for this object.

virtual Bool_t	IsSortable () const

virtual void	ls (Option_t *option="") const
	List TNamed name and title.

TNamed &	operator= (const TNamed &rhs)
	TNamed assignment operator.

virtual Int_t	Sizeof () const
	Return size of the TNamed part of the TObject.

Public Member Functions inherited from TObject
	TObject ()
	TObject constructor.

	TObject (const TObject &object)
	TObject copy ctor.

virtual	~TObject ()
	TObject destructor.

void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract.

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad.

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 const char *	ClassName () const
	Returns name of class to which the object belongs.

virtual void	Delete (Option_t *option="")
	Delete this object.

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 for instance with: `gROOT->SetSelectedPad(gPad)`.

virtual void	Dump () const
	Dump contents of object on stdout.

virtual void	Error (const char method, const char msgfmt,...) const
	Issue error message.

virtual void	Execute (const char method, const char params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g.

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray.

virtual void	Fatal (const char method, const char msgfmt,...) const
	Issue fatal error message.

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object.

virtual const char *	GetIconName () const
	Returns mime type name of object.

virtual Option_t *	GetOption () const

virtual UInt_t	GetUniqueID () const
	Return the unique object id.

virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out.

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	Inspect () const
	Dump contents of this object in a graphics canvas.

void	InvertBit (UInt_t f)

Bool_t	IsDestructed () const
	IsDestructed.

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).

R__ALWAYS_INLINE Bool_t	IsOnHeap () const

R__ALWAYS_INLINE Bool_t	IsZombie () const

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).

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification.

void	Obsolete (const char method, const char asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete.

void	operator delete (void *ptr)
	Operator delete.

void	operator delete[] (void *ptr)
	Operator delete [].

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)

TObject &	operator= (const TObject &rhs)
	TObject assignment operator.

virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list.

virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory.

void	ResetBit (UInt_t f)

virtual void	SaveAs (const char filename="", Option_t option="") const
	Save this object in the file specified by filename.

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	SetUniqueID (UInt_t uid)
	Set the unique object id.

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

virtual void	Warning (const char method, const char msgfmt,...) const
	Issue warning message.

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory.

Public Member Functions inherited from TAttLine
	TAttLine ()
	AttLine default constructor.

	TAttLine (Color_t lcolor, Style_t lstyle, Width_t lwidth)
	AttLine normal constructor.

virtual	~TAttLine ()
	AttLine destructor.

void	Copy (TAttLine &attline) const
	Copy this line attributes to a new TAttLine.

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.

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.

virtual void	Modify ()
	Change current line attributes if necessary.

virtual void	ResetAttLine (Option_t *option="")
	Reset this line attributes to default values.

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	SetLineAttributes ()
	Invoke the DialogCanvas Line attributes.

virtual void	SetLineColor (Color_t lcolor)
	Set the line color.

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.

Public Member Functions inherited from TAttFill
	TAttFill ()
	AttFill default constructor.

	TAttFill (Color_t fcolor, Style_t fstyle)
	AttFill normal constructor.

virtual	~TAttFill ()
	AttFill destructor.

void	Copy (TAttFill &attfill) const
	Copy this fill attributes to a new TAttFill.

virtual Color_t	GetFillColor () const
	Return the fill area color.

virtual Style_t	GetFillStyle () const
	Return the fill area style.

virtual Bool_t	IsTransparent () const

virtual void	Modify ()
	Change current fill area attributes if necessary.

virtual void	ResetAttFill (Option_t *option="")
	Reset this fill attributes to default values.

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	SetFillAttributes ()
	Invoke the DialogCanvas Fill attributes.

virtual void	SetFillColor (Color_t fcolor)
	Set the fill area 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.

Public Member Functions inherited from TAttMarker
	TAttMarker ()
	TAttMarker default constructor.

	TAttMarker (Color_t color, Style_t style, Size_t msize)
	TAttMarker normal constructor.

virtual	~TAttMarker ()
	TAttMarker destructor.

void	Copy (TAttMarker &attmarker) const
	Copy this marker attributes to a new TAttMarker.

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.

virtual void	Modify ()
	Change current marker attributes if necessary.

virtual void	ResetAttMarker (Option_t *toption="")
	Reset this marker attributes to the default values.

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.

virtual void	SetMarkerAttributes ()
	Invoke the DialogCanvas Marker attributes.

virtual void	SetMarkerColor (Color_t mcolor=1)
	Set the marker color.

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.

Public Member Functions inherited from RooPlotable
	RooPlotable ()

virtual	~RooPlotable ()

TObject *	crossCast ()
	Return cast of RooPlotable as TObject.

const char *	getYAxisLabel () const

Double_t	getYAxisMax () const

Double_t	getYAxisMin () const

void	setYAxisLabel (const char *label)

void	setYAxisLimits (Double_t ymin, Double_t ymax)

void	updateYAxisLimits (Double_t y)

Public Member Functions inherited from RooPrintable
	RooPrintable ()

virtual	~RooPrintable ()

virtual Int_t	defaultPrintContents (Option_t *opt) const
	Default choice of contents to be printed (name and value)

virtual StyleOption	defaultPrintStyle (Option_t *opt) const

virtual void	printAddress (std::ostream &os) const
	Print class name of object.

virtual void	printArgs (std::ostream &os) const
	Interface for printing of object arguments.

virtual void	printExtras (std::ostream &os) const
	Interface to print extras of object.

virtual void	printStream (std::ostream &os, Int_t contents, StyleOption style, TString indent="") const
	Print description of object on ostream, printing contents set by contents integer, which is interpreted as an OR of 'enum ContentsOptions' values and in the style given by 'enum StyleOption'.

virtual void	printTree (std::ostream &os, TString indent="") const
	Interface for tree structure printing of object.

virtual void	printValue (std::ostream &os) const
	Interface to print value of object.

Protected Member Functions
void	addPoints (const RooAbsFunc &func, Double_t xlo, Double_t xhi, Int_t minPoints, Double_t prec, Double_t resolution, WingMode wmode, Int_t numee=0, Bool_t doEEVal=kFALSE, Double_t eeVal=0., std::list< Double_t > *samplingHint=0)
	Add points calculated with the specified function, over the range (xlo,xhi).

void	addRange (const RooAbsFunc &func, Double_t x1, Double_t x2, Double_t y1, Double_t y2, Double_t minDy, Double_t minDx, Int_t numee=0, Bool_t doEEVal=kFALSE, Double_t eeVal=0.)
	Fill the range (x1,x2) with points calculated using func(&x).

void	calcBandInterval (const std::vector< RooCurve * > &plusVar, const std::vector< RooCurve * > &minusVar, Int_t i, const TMatrixD &V, Double_t Z, Double_t &lo, Double_t &hi) const
	Retrieve variation points from curves.

void	calcBandInterval (const std::vector< RooCurve * > &variations, Int_t i, Double_t Z, Double_t &lo, Double_t &hi, Bool_t approxGauss) const

void	initialize ()
	Perform initialization that is common to all curves.

void	shiftCurveToZero (Double_t prevYMax)
	Find lowest point in curve and move all points in curve so that lowest point will go exactly through zero.

Protected Member Functions inherited from TGraph
virtual Double_t **	Allocate (Int_t newsize)
	Allocate internal data structures for `newsize` points.

Double_t **	AllocateArrays (Int_t Narrays, Int_t arraySize)
	Allocate arrays.

virtual void	CopyAndRelease (Double_t **newarrays, Int_t ibegin, Int_t iend, Int_t obegin)
	Copy points from fX and fY to arrays[0] and arrays[1] or to fX and fY if arrays == 0 and ibegin != iend.

virtual Bool_t	CopyPoints (Double_t **newarrays, Int_t ibegin, Int_t iend, Int_t obegin)
	Copy points from fX and fY to arrays[0] and arrays[1] or to fX and fY if arrays == 0 and ibegin != iend.

Bool_t	CtorAllocate ()
	In constructors set fNpoints than call this method.

virtual Bool_t	DoMerge (const TGraph *g)
	protected function to perform the merge operation of a graph

Double_t **	ExpandAndCopy (Int_t size, Int_t iend)
	if size > fMaxSize allocate new arrays of 2*size points and copy iend first points.

virtual void	FillZero (Int_t begin, Int_t end, Bool_t from_ctor=kTRUE)
	Set zero values for point arrays in the range [begin, end) Should be redefined in descendant classes.

Double_t **	ShrinkAndCopy (Int_t size, Int_t iend)
	if size*2 <= fMaxSize allocate new arrays of size points, copy points [0,oend).

virtual void	SwapPoints (Int_t pos1, Int_t pos2)
	Swap points.

Protected Member Functions inherited from TObject
virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected).

void	MakeZombie ()

Protected Attributes
Bool_t	_showProgress

Protected Attributes inherited from TGraph
TList *	fFunctions
	Pointer to list of functions (fits and user)

TH1F *	fHistogram
	Pointer to histogram used for drawing axis.

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.

Int_t	fNpoints
	Number of points <= fMaxSize.

Double_t *	fX
	[fNpoints] array of X points

Double_t *	fY
	[fNpoints] array of Y points

Protected Attributes inherited from TNamed
TString	fName

TString	fTitle

Protected Attributes inherited from TAttLine
Color_t	fLineColor
	Line color.

Style_t	fLineStyle
	Line style.

Width_t	fLineWidth
	Line width.

Protected Attributes inherited from TAttFill
Color_t	fFillColor
	Fill area color.

Style_t	fFillStyle
	Fill area style.

Protected Attributes inherited from TAttMarker
Color_t	fMarkerColor
	Marker color.

Size_t	fMarkerSize
	Marker size.

Style_t	fMarkerStyle
	Marker style.

Protected Attributes inherited from RooPlotable
Double_t	_normValue

TString	_yAxisLabel

Double_t	_ymax

Double_t	_ymin

Additional Inherited Members
Static Public Member Functions inherited from TGraph
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 Public Member Functions inherited from TObject
static Longptr_t	GetDtorOnly ()
	Return destructor only flag.

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.

Static Public Member Functions inherited from TAttMarker
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 Public Member Functions inherited from RooPrintable
static std::ostream &	defaultPrintStream (std::ostream *os=0)
	Return a reference to the current default stream to use in Print().

static void	nameFieldLength (Int_t newLen)
	Set length of field reserved from printing name of RooAbsArgs in multi-line collection printing to given amount.

Protected Types inherited from TObject
enum	{ kOnlyPrepStep = BIT(3) }

Static Protected Member Functions inherited from TGraph
static void	SwapValues (Double_t *arr, Int_t pos1, Int_t pos2)
	Swap values.

Static Protected Attributes inherited from RooPrintable
static Int_t	_nameLength

#include <RooCurve.h>

Inheritance diagram for RooCurve:

[legend]

Member Enumeration Documentation

◆ WingMode

enum RooCurve::WingMode

Enumerator
NoWings
Straight
Extended

Definition at line 35 of file RooCurve.h.

Constructor & Destructor Documentation

◆ RooCurve() [1/4]

RooCurve::RooCurve ( )

Default constructor.

Definition at line 70 of file RooCurve.cxx.

◆ RooCurve() [2/4]

RooCurve::RooCurve	(	const RooAbsReal &	f,
		RooAbsRealLValue &	x,
		Double_t	xlo,
		Double_t	xhi,
		Int_t	xbins,
		Double_t	scaleFactor = `1`,
		const RooArgSet *	normVars = `0`,
		Double_t	prec = `1e-3`,
		Double_t	resolution = `1e-3`,
		Bool_t	shiftToZero = `kFALSE`,
		WingMode	wmode = `Extended`,
		Int_t	nEvalError = `-1`,
		Int_t	doEEVal = `kFALSE`,
		Double_t	eeVal = `0`,
		Bool_t	showProg = `kFALSE`
	)

Create a 1-dim curve of the value of the specified real-valued expression as a function of x.

Use the optional precision parameter to control how precisely the smooth curve is rasterized. Use the optional argument set to specify how the expression should be normalized. Use the optional scale factor to rescale the expression after normalization. If shiftToZero is set, the entire curve is shifted down to make the lowest point of the curve go through zero.

Definition at line 84 of file RooCurve.cxx.

◆ RooCurve() [3/4]

RooCurve::RooCurve	(	const char *	name,
		const char *	title,
		const RooAbsFunc &	func,
		Double_t	xlo,
		Double_t	xhi,
		UInt_t	minPoints,
		Double_t	prec = `1e-3`,
		Double_t	resolution = `1e-3`,
		Bool_t	shiftToZero = `kFALSE`,
		WingMode	wmode = `Extended`,
		Int_t	nEvalError = `-1`,
		Int_t	doEEVal = `kFALSE`,
		Double_t	eeVal = `0`
	)

Create a 1-dim curve of the value of the specified real-valued expression as a function of x.

Use the optional precision parameter to control how precisely the smooth curve is rasterized. If shiftToZero is set, the entire curve is shifted down to make the lowest point in of the curve go through zero.

Definition at line 169 of file RooCurve.cxx.

◆ ~RooCurve()

RooCurve::~RooCurve ( )

virtual

Destructor.

Definition at line 250 of file RooCurve.cxx.

◆ RooCurve() [4/4]

RooCurve::RooCurve	(	const char *	name,
		const char *	title,
		const RooCurve &	c1,
		const RooCurve &	c2,
		Double_t	scale1 = `1.`,
		Double_t	scale2 = `1.`
	)

Constructor of a curve as sum of two other curves.

\[ C_\mathrm{sum} = \mathrm{scale1}*c1 + \mathrm{scale2}*c2 \]

Parameters

[in]	name	Name of the curve (to retrieve it from a plot)
[in]	title	Title (for plotting).
[in]	c1	First curve.
[in]	c2	Second curve.
[in]	scale1	Scale y values for c1 by this factor.
[in]	scale1	Scale y values for c2 by this factor.

Definition at line 203 of file RooCurve.cxx.

Member Function Documentation

◆ addPoint()

void RooCurve::addPoint	(	Double_t	x,
		Double_t	y
	)

Add a point with the specified coordinates. Update our y-axis limits.

Definition at line 470 of file RooCurve.cxx.

◆ addPoints()

void RooCurve::addPoints	(	const RooAbsFunc &	func,
		Double_t	xlo,
		Double_t	xhi,
		Int_t	minPoints,
		Double_t	prec,
		Double_t	resolution,
		WingMode	wmode,
		Int_t	numee = `0`,
		Bool_t	doEEVal = `kFALSE`,
		Double_t	eeVal = `0.`,
		std::list< Double_t > *	samplingHint = `0`
	)

protected

Add points calculated with the specified function, over the range (xlo,xhi).

Add at least minPoints equally spaced points, and add sufficient points so that the maximum deviation from the final straight-line segments is prec*(ymax-ymin), down to a minimum horizontal spacing of resolution*(xhi-xlo).

Definition at line 309 of file RooCurve.cxx.

◆ addRange()

void RooCurve::addRange	(	const RooAbsFunc &	func,
		Double_t	x1,
		Double_t	x2,
		Double_t	y1,
		Double_t	y2,
		Double_t	minDy,
		Double_t	minDx,
		Int_t	numee = `0`,
		Bool_t	doEEVal = `kFALSE`,
		Double_t	eeVal = `0.`
	)

protected

Fill the range (x1,x2) with points calculated using func(&x).

No point will be added at x1, and a point will always be added at x2. The density of points will be calculated so that the maximum deviation from a straight line approximation is prec*(ymax-ymin) down to the specified minimum horizontal spacing.

Definition at line 425 of file RooCurve.cxx.

◆ average()

Double_t RooCurve::average	(	Double_t	lo,
		Double_t	hi
	)		const

Return average curve value in [xFirst,xLast] by integrating curve between points and dividing by xLast-xFirst.

Definition at line 606 of file RooCurve.cxx.

◆ calcBandInterval() [1/2]

void RooCurve::calcBandInterval	(	const std::vector< RooCurve * > &	plusVar,
		const std::vector< RooCurve * > &	minusVar,
		Int_t	i,
		const TMatrixD &	V,
		Double_t	Z,
		Double_t &	lo,
		Double_t &	hi
	)		const

protected

Retrieve variation points from curves.

Definition at line 818 of file RooCurve.cxx.

◆ calcBandInterval() [2/2]

void RooCurve::calcBandInterval	(	const std::vector< RooCurve * > &	variations,
		Int_t	i,
		Double_t	Z,
		Double_t &	lo,
		Double_t &	hi,
		Bool_t	approxGauss
	)		const

protected

Definition at line 849 of file RooCurve.cxx.

◆ chiSquare()

Double_t RooCurve::chiSquare	(	const RooHist &	hist,
		int	nFitParam
	)		const

Calculate the chi^2/NDOF of this curve with respect to the histogram 'hist' accounting nFitParam floating parameters in case the curve was the result of a fit.

Definition at line 558 of file RooCurve.cxx.

◆ findPoint()

Int_t RooCurve::findPoint	(	Double_t	xvalue,
		Double_t	tolerance = `1e-10`
	)		const

Find the nearest point to xvalue.

Return -1 if distance exceeds tolerance

Definition at line 670 of file RooCurve.cxx.

◆ getFitRangeBinW()

Double_t RooCurve::getFitRangeBinW ( ) const

virtual

Get the bin width associated with this plotable object.

It is alwats zero for curves

Implements RooPlotable.

Definition at line 502 of file RooCurve.cxx.

◆ getFitRangeNEvt() [1/2]

Double_t RooCurve::getFitRangeNEvt ( ) const

virtual

Return the number of events associated with the plotable object, it is always 1 for curves.

Implements RooPlotable.

Definition at line 483 of file RooCurve.cxx.

◆ getFitRangeNEvt() [2/2]

Double_t RooCurve::getFitRangeNEvt	(	Double_t	xlo,
		Double_t	xhi
	)		const

virtual

Return the number of events associated with the plotable object, in the given range.

It is always 1 for curves

Implements RooPlotable.

Definition at line 492 of file RooCurve.cxx.

◆ initialize()

void RooCurve::initialize ( )

protected

Perform initialization that is common to all curves.

Definition at line 259 of file RooCurve.cxx.

◆ interpolate()

Double_t RooCurve::interpolate	(	Double_t	xvalue,
		Double_t	tolerance = `1e-10`
	)		const

Return linearly interpolated value of curve at xvalue.

If distance to nearest point is less than tolerance, return nearest point value instead

Definition at line 692 of file RooCurve.cxx.

◆ isIdentical()

Bool_t RooCurve::isIdentical	(	const RooCurve &	other,
		Double_t	tol = `1e-6`,
		bool	verbose = `true`
	)		const

Return true if curve is identical to other curve allowing for given absolute tolerance on each point compared point.

Definition at line 887 of file RooCurve.cxx.

◆ makeErrorBand() [1/2]

RooCurve * RooCurve::makeErrorBand	(	const std::vector< RooCurve * > &	plusVar,
		const std::vector< RooCurve * > &	minusVar,
		const TMatrixD &	C,
		Double_t	Z = `1`
	)		const

Construct filled RooCurve represented error band represent the error added in quadrature defined by the curves arguments plusVar and minusVar corresponding to one-sigma variations of each parameter.

The resulting error band, combined used the correlation matrix C is multiplied with the significance parameter Z to construct the equivalent of a Z sigma error band (in Gaussian approximation)

Definition at line 778 of file RooCurve.cxx.

◆ makeErrorBand() [2/2]

RooCurve * RooCurve::makeErrorBand	(	const std::vector< RooCurve * > &	variations,
		Double_t	Z = `1`
	)		const

Construct filled RooCurve represented error band that captures alpha% of the variations of the curves passed through argument variations, where the percentage alpha corresponds to the central interval fraction of a significance Z.

Definition at line 739 of file RooCurve.cxx.

◆ Print()

virtual void RooCurve::Print ( Option_t * chopt = 0 ) const

inlinevirtual

Print graph values.

Reimplemented from TGraph.

Definition at line 59 of file RooCurve.h.

◆ printClassName()

void RooCurve::printClassName ( std::ostream & os ) const

virtual

Print the class name of this curve.

Reimplemented from RooPrintable.

Definition at line 530 of file RooCurve.cxx.

◆ printMultiline()

void RooCurve::printMultiline	(	std::ostream &	os,
		Int_t	contents,
		Bool_t	verbose = `kFALSE`,
		TString	indent = `""`
	)		const

virtual

Print the details of this curve.

Reimplemented from RooPlotable.

Definition at line 540 of file RooCurve.cxx.

◆ printName()

void RooCurve::printName ( std::ostream & os ) const

virtual

Print name of object.

Reimplemented from RooPrintable.

Definition at line 510 of file RooCurve.cxx.

◆ printTitle()

void RooCurve::printTitle ( std::ostream & os ) const

virtual

Print the title of this curve.

Reimplemented from RooPrintable.

Definition at line 521 of file RooCurve.cxx.

◆ shiftCurveToZero()

void RooCurve::shiftCurveToZero ( Double_t prevYMax )

protected

Find lowest point in curve and move all points in curve so that lowest point will go exactly through zero.

Definition at line 273 of file RooCurve.cxx.

Member Data Documentation

◆ _showProgress

Bool_t RooCurve::_showProgress

protected

Definition at line 91 of file RooCurve.h.

Libraries for RooCurve:

[legend]

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

roofit/roofitcore/inc/RooCurve.h
roofit/roofitcore/src/RooCurve.cxx

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Member Enumeration Documentation

◆ WingMode

Constructor & Destructor Documentation

◆ RooCurve() [1/4]

◆ RooCurve() [2/4]

◆ RooCurve() [3/4]

◆ ~RooCurve()

◆ RooCurve() [4/4]

Member Function Documentation

◆ addPoint()

◆ addPoints()

◆ addRange()

◆ average()

◆ calcBandInterval() [1/2]

◆ calcBandInterval() [2/2]

◆ chiSquare()

◆ findPoint()

◆ getFitRangeBinW()

◆ getFitRangeNEvt() [1/2]

◆ getFitRangeNEvt() [2/2]

◆ initialize()

◆ interpolate()

◆ isIdentical()

◆ makeErrorBand() [1/2]

◆ makeErrorBand() [2/2]

◆ Print()

◆ printClassName()

◆ printMultiline()

◆ printName()

◆ printTitle()

◆ shiftCurveToZero()

Member Data Documentation

◆ _showProgress