Graphics object made of three arrays X, Y and Z with the same number of points each.

Creating a TGraph2D
Drawing options
Examples
Definition of the Delaunay triangulation (After B. Delaunay)

Creating a TGraph2D

This class has different constructors:

With an array's dimension and three arrays x, y, and z:
auto g = new TGraph2D(n, x, y, z);

g
#define g(i)
Definition RSha256.hxx:105

TGraph2D::TGraph2D
TGraph2D()
Graph2D default constructor.
Definition TGraph2D.cxx:242

y
Double_t y[n]
Definition legend1.C:17

x
Double_t x[n]
Definition legend1.C:17

n
const Int_t n
Definition legend1.C:16

x, y, z arrays can be doubles, floats, or ints.
With an array's dimension only:
auto g = new TGraph2D(n);

The internal arrays are then filled with SetPoint(). The following line fills the internal arrays at the position i with the values x, y, z.
g->SetPoint(i, x, y, z);
Without parameters:
auto g = new TGraph2D();

again SetPoint() must be used to fill the internal arrays.
From a file:
auto g = new TGraph2D("graph.dat");

Arrays are read from the ASCII file "graph.dat" according to a specifies format. The default format is %lg %lg %lg

Note that in any of these three cases, SetPoint() can be used to change a data point or add a new one. If the data point index (i) is greater than the current size of the internal arrays, they are automatically extended.

Like TGraph some TGraph2D constructors do not have the TGraph2D title and name as parameters. For these constructors TGraph2D has the default title and name "Graph2D". To change the default title and name SetTitle and SetName should be called on the TGraph2D after its creation.

Drawing options

Specific drawing options can be used to paint a TGraph2D:

Option	Description
"TRI"	The Delaunay triangles are drawn using filled area. An hidden surface drawing technique is used. The surface is painted with the current fill area color. The edges of each triangles are painted with the current line color.
"TRIW"	The Delaunay triangles are drawn as wire frame.
"TRI1"	The Delaunay triangles are painted with color levels. The edges of each triangles are painted with the current line color.
"TRI2"	The Delaunay triangles are painted with color levels.
"P"	Draw a marker at each vertex.
"P0"	Draw a circle at each vertex. Each circle background is white.
"PCOL"	Draw a marker at each vertex. The color of each marker is defined according to its Z position.
"LINE"	Draw a 3D polyline.
"CONT5"	Draw a contour plot using Delaunay triangles.

The Delaunay triangulation algorithm assumes that each (x, y) coordinate corresponds to a unique z value, meaning duplicate (x, y) points are not allowed. Consequently, when using drawing options that rely on this algorithm (e.g., TRI, SURF, etc.), a warning may appear instructing you to remove duplicates (see RemoveDuplicates()).

A TGraph2D can be also drawn with any options valid to draw a 2D histogram (like COL, SURF, LEGO, CONT etc..).

When a TGraph2D is drawn with one of the 2D histogram drawing option, an intermediate 2D histogram is filled using the Delaunay triangles to interpolate the data set. The 2D histogram has equidistant bins along the X and Y directions. The number of bins along each direction can be change using SetNpx() and SetNpy(). Each bin is filled with the Z value found via a linear interpolation on the plane defined by the triangle above the (X,Y) coordinates of the bin center.

The existing (X,Y,Z) points can be randomly scattered. The Delaunay triangles are build in the (X,Y) plane. These 2D triangles are then used to define flat planes in (X,Y,Z) over which the interpolation is done to fill the 2D histogram. The 3D triangles int takes build a 3D surface in the form of tessellating triangles at various angles. The triangles found can be drawn in 3D with one of the TGraph2D specific drawing options.

The histogram generated by the Delaunay interpolation can be accessed using the GetHistogram() method.

The axis settings (title, ranges etc ...) can be changed accessing the axis via the GetXaxis GetYaxis and GetZaxis methods. They access the histogram axis created at drawing time only. Therefore they should called after the TGraph2D is drawn:

auto g = new TGraph2D();
 
[...]
 
g->Draw("tri1");
gPad->Update();
g->GetXaxis()->SetTitle("X axis title");

Examples

SURF1 Example

{
   auto c = new TCanvas("c","Graph2D example",0,0,600,400);
   Double_t x, y, z, P = 6.;
   Int_t np = 200;
   auto dt = new TGraph2D();
   dt->SetTitle("Graph title; X axis title; Y axis title; Z axis title");
   auto r = new TRandom();
   for (Int_t N=0; N<np; N++) {
      x = 2*P*(r->Rndm(N))-P;
      y = 2*P*(r->Rndm(N))-P;
      z = (sin(x)/x)*(sin(y)/y)+0.2;
      dt->SetPoint(N,x,y,z);
   }
   gStyle->SetPalette(1);
   dt->Draw("surf1");
}

Fitting Example

2D graphs can be fitted as shown by the following example:

 
#include <TMath.h>
#include <TGraph2D.h>
#include <TRandom.h>
#include <TStyle.h>
#include <TCanvas.h>
#include <TF2.h>
#include <TH1.h>
 
void graph2dfit()
{
   gStyle->SetOptStat(0);
   gStyle->SetOptFit();
 
   auto c = new TCanvas("c","Graph2D example",0,0,600,800);
   c->Divide(2,3);
 
   double rnd, x, y, z;
   double e = 0.3;
   int nd = 400;
   int np = 10000;
 
   TRandom r;
   double fl = 6;
   auto f2 = new TF2("f2","1000*(([0]*sin(x)/x)*([1]*sin(y)/y))+200",
      -fl,fl,-fl,fl);
   f2->SetParameters(1,1);
   auto dt = new TGraph2D();
 
   // Fill the 2D graph
   double zmax = 0;
   for (int N=0; N<nd; N++) {
      f2->GetRandom2(x,y);
      // Generate a random number in [-e,e]
      rnd = 2*r.Rndm()*e-e;
      z = f2->Eval(x,y)*(1+rnd);
      if (z>zmax) zmax = z;
      dt->SetPoint(N,x,y,z);
   }
 
   double hr = 350;
   auto h1 = new TH1D("h1",
   "#splitline{Difference between Original}{#splitline{function and Function}{with noise}}",
   100, -hr, hr);
   auto h2 = new TH1D("h2",
   "#splitline{Difference between Original}{#splitline{function and Delaunay triangles}{interpolation}}",
   100, -hr, hr);
   auto h3 = new TH1D("h3",
   "#splitline{Difference between Original}{function and Minuit fit}",
   500, -hr, hr);
 
   f2->SetParameters(0.5,1.5);
   dt->Fit(f2);
   auto fit2 = (TF2*)dt->FindObject("f2");
 
   f2->SetParameters(1,1);
 
   for (int N=0; N<np; N++) {
      f2->GetRandom2(x,y);
      // Generate a random number in [-e,e]
      rnd = 2*r.Rndm()*e-e;
      z = f2->Eval(x,y)*(1+rnd);
      h1->Fill(f2->Eval(x,y)-z);
      z = dt->Interpolate(x,y);
      h2->Fill(f2->Eval(x,y)-z);
      z = fit2->Eval(x,y);
      h3->Fill(f2->Eval(x,y)-z);
   }
 
   c->cd(1);
   f2->SetTitle("Original function with Graph2D points on top");
   f2->SetMaximum(zmax);
   gStyle->SetHistTopMargin(0);
   f2->Draw("surf1");
   dt->Draw("same p0");
 
   c->cd(3);
   dt->SetMargin(0.1);
   dt->SetFillColor(36);
   dt->SetTitle("Histogram produced with Delaunay interpolation");
   dt->Draw("surf4");
 
   c->cd(5);
   fit2->SetTitle("Minuit fit result on the Graph2D points");
   fit2->Draw("surf1");
 
   h1->SetFillColor(47);
   h2->SetFillColor(38);
   h3->SetFillColor(29);
 
   c->cd(2); h1->Fit("gaus","Q") ; h1->Draw();
   c->cd(4); h2->Fit("gaus","Q") ; h2->Draw();
   c->cd(6); h3->Fit("gaus","Q") ; h3->Draw();
   c->cd();
}

PCOL Example

Example showing the PCOL option.

{
   auto c = new TCanvas("c","Graph2D example",0,0,600,400);
   Double_t P = 5.;
   Int_t npx  = 20 ;
   Int_t npy  = 20 ;
   Double_t x = -P;
   Double_t y = -P;
   Double_t z;
   Int_t k = 0;
   Double_t dx = (2*P)/npx;
   Double_t dy = (2*P)/npy;
   auto dt = new TGraph2D(npx*npy);
   dt->SetNpy(41);
   dt->SetNpx(40);
   for (Int_t i=0; i<npx; i++) {
      for (Int_t j=0; j<npy; j++) {
         z = sin(sqrt(x*x+y*y))+1;
         dt->SetPoint(k,x,y,z);
         k++;
         y = y+dy;
      }
      x = x+dx;
      y = -P;
   }
   gStyle->SetPalette(1);
   dt->SetMarkerStyle(20);
   dt->Draw("pcol");
}

Definition of the Delaunay triangulation (After B. Delaunay)

For a set S of points in the Euclidean plane, the unique triangulation DT(S) of S such that no point in S is inside the circumcircle of any triangle in DT(S). DT(S) is the dual of the Voronoi diagram of S. If n is the number of points in S, the Voronoi diagram of S is the partitioning of the plane containing S points into n convex polygons such that each polygon contains exactly one point and every point in a given polygon is closer to its central point than to any other. A Voronoi diagram is sometimes also known as a Dirichlet tessellation.

This applet gives a nice practical view of Delaunay triangulation and Voronoi diagram.

Definition at line 41 of file TGraph2D.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 )) }

Public Member Functions
	TGraph2D ()
	Graph2D default constructor.

	TGraph2D (const char filename, const char format="%lg %lg %lg", Option_t *option="")
	Graph2D constructor reading input from filename filename is assumed to contain at least three columns of numbers.

	TGraph2D (const char name, const char title, Int_t n, Double_t x, Double_t y, Double_t *z)
	Graph2D constructor with name, title and three vectors of doubles as input.

	TGraph2D (const TGraph2D &)
	Graph2D copy constructor.

	TGraph2D (Int_t n)
	Graph2D constructor.

	TGraph2D (Int_t n, Double_t x, Double_t y, Double_t *z)
	Graph2D constructor with three vectors of doubles as input.

	TGraph2D (Int_t n, Float_t x, Float_t y, Float_t *z)
	Graph2D constructor with three vectors of floats as input.

	TGraph2D (Int_t n, Int_t x, Int_t y, Int_t *z)
	Graph2D constructor with three vectors of ints as input.

	TGraph2D (TH2 *h2)
	Graph2D constructor with a TH2 (h2) as input.

	~TGraph2D () override
	TGraph2D 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 (TF2 *f, Double_t c1=1)
	Performs the operation: `z = z + c1*f(x,y,z)` Errors are not recalculated.

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

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

virtual void	Apply (TF2 *f)
	Apply function f to all the data points f may be a 2-D function TF2 or 3-d function TF3 The Z values of the 2D graph are replaced by the new values computed using the function.

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

void	Clear (Option_t *option="") override
	Free all memory allocated by this object.

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	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.

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

virtual void	DirectoryAutoAdd (TDirectory *)
	Registration of the graph to the given directory.

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
	Computes distance from point px,py to a graph.

void	Draw (Option_t *option="P0") override
	Specific drawing options can be used to paint a TGraph2D:

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	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=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
	Executes action corresponding to one event.

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="")
	Fit this graph with the global function named `fname`.

virtual TFitResultPtr	Fit (TF2 f2, Option_t option="", Option_t *goption="")
	Fits this 2D graph with function f2.

virtual void	FitPanel ()
	Display a GUI panel with all graph fit options.

TList *	GetContourList (Double_t contour)
	Returns the X and Y graphs building a contour.

TDirectory *	GetDirectory () const

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

virtual Double_t	GetErrorX (Int_t bin) const
	This function is called by Graph2DFitChisquare.

virtual Double_t	GetErrorY (Int_t bin) const
	This function is called by Graph2DFitChisquare.

virtual Double_t	GetErrorZ (Int_t bin) const
	This function is called by Graph2DFitChisquare.

virtual Double_t *	GetEX () const

virtual Double_t *	GetEXhigh () const

virtual Double_t *	GetEXlow () const

virtual Double_t *	GetEY () const

virtual Double_t *	GetEYhigh () const

virtual Double_t *	GetEYlow () const

virtual Double_t *	GetEZ () const

virtual Double_t *	GetEZhigh () const

virtual Double_t *	GetEZlow () const

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

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

TF2 *	GetFunction (const char *name) const
	Return pointer to function with name.

TH2D *	GetHistogram (Option_t *option="")
	By default returns a pointer to the Delaunay histogram.

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

Double_t	GetMargin () 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

Double_t	GetMinimum () const

Int_t	GetN () const

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

Int_t	GetNpx () const

Int_t	GetNpy () const

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py).

virtual Option_t *	GetOption () const

virtual Int_t	GetPoint (Int_t i, Double_t &x, Double_t &y, Double_t &z) const
	Get x, y and z values for point number i.

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	GetXmax () const
	Returns the X maximum.

virtual Double_t	GetXmaxE () const

Double_t	GetXmin () const
	Returns the X minimum.

virtual Double_t	GetXminE () const

Double_t *	GetY () const

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

Double_t	GetYmax () const
	Returns the Y maximum.

virtual Double_t	GetYmaxE () const

Double_t	GetYmin () const
	Returns the Y minimum.

virtual Double_t	GetYminE () const

Double_t *	GetZ () const

TAxis *	GetZaxis () const
	Get z axis of the graph.

Double_t	GetZmax () const
	Returns the Z maximum.

virtual Double_t	GetZmaxE () const

Double_t	GetZmin () const
	Returns the Z minimum.

virtual Double_t	GetZminE () const

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

Double_t	Interpolate (Double_t x, Double_t y)
	Finds the z value at the position (x,y) thanks to the Delaunay interpolation.

void	InvertBit (UInt_t f)

TClass *	IsA () const override

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

Bool_t	IsSortable () const override

virtual Bool_t	IsTransparent () const

R__ALWAYS_INLINE Bool_t	IsZombie () const

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).

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 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)

TGraph2D &	operator= (const TGraph2D &)
	Graph2D operator "=".

void	Paint (Option_t *option="") override
	Paints this 2D graph with its current attributes.

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 2D graph values.

TH1 *	Project (Option_t *option="x") const
	Projects a 2-d graph into 1 or 2-d histograms depending on the option parameter.

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.

Int_t	RemoveDuplicates ()
	Deletes duplicated points.

Int_t	RemovePoint (Int_t ipoint)
	Deletes point number ipoint.

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)

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

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

virtual void	Scale (Double_t c1=1., Option_t *option="z")
	Multiply the values of a TGraph2D by a constant c1.

virtual void	Set (Int_t n)
	Set number of points in the 2D graph.

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	SetDirectory (TDirectory *dir)
	By default when an 2D graph is created, it is added to the list of 2D graph objects in the current directory in memory.

virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object.

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	SetHistogram (TH2 h, Option_t option="")
	Sets the histogram to be filled.

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.

void	SetMargin (Double_t m=0.1)
	Sets the extra space (in %) around interpolated area for the 2D histogram.

void	SetMarginBinsContent (Double_t z=0.)
	Sets the histogram bin height for points lying outside the TGraphDelaunay convex hull ie: the bins in the margin.

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=-1111)
	Set maximum.

void	SetMaxIter (Int_t n=100000)

void	SetMinimum (Double_t minimum=-1111)
	Set minimum.

void	SetName (const char *name) override
	Changes the name of this 2D graph.

void	SetNameTitle (const char name, const char title) override
	Change the name and title of this 2D graph.

void	SetNpx (Int_t npx=40)
	Sets the number of bins along X used to draw the function.

void	SetNpy (Int_t npx=40)
	Sets the number of bins along Y used to draw the function.

virtual void	SetPoint (Int_t point, Double_t x, Double_t y, Double_t z)
	Sets point number n.

void	SetTitle (const char *title="") override
	Sets the 2D graph title.

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.

void	Streamer (TBuffer &) override
	Stream a class object.

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

virtual void	UseCurrentStyle ()
	Set current style settings in this object 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.

Static Public Member Functions
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

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
void	Build (Int_t n)
	Creates the 2D graph basic data structure.

virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected).

void	MakeZombie ()

void	SavePrimitiveNameTitle (std::ostream &out, const char *variable_name)
	Save object name and title into the output stream "out".

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.

Protected Attributes
TObject *	fDelaunay
	! Pointer to Delaunay interpolator object

TDirectory *	fDirectory
	!Pointer to directory holding this 2D graph

Color_t	fFillColor
	Fill area color.

Style_t	fFillStyle
	Fill area style.

TList *	fFunctions
	Pointer to list of functions (fits and user)

TH2D *	fHistogram
	!2D histogram of z values linearly interpolated on the triangles

Color_t	fLineColor
	Line color.

Style_t	fLineStyle
	Line style.

Width_t	fLineWidth
	Line width.

Double_t	fMargin
	Extra space (in %) around interpolated area for fHistogram.

Color_t	fMarkerColor
	Marker color.

Size_t	fMarkerSize
	Marker size.

Style_t	fMarkerStyle
	Marker style.

Double_t	fMaximum
	Maximum value for plotting along z.

Int_t	fMaxIter
	Maximum number of iterations to find Delaunay triangles.

Double_t	fMinimum
	Minimum value for plotting along z.

TString	fName

Int_t	fNpoints
	Number of points in the data set.

Int_t	fNpx
	Number of bins along X in fHistogram.

Int_t	fNpy
	Number of bins along Y in fHistogram.

TVirtualHistPainter *	fPainter
	!Pointer to histogram painter

Int_t	fSize
	!Real size of fX, fY and fZ

TString	fTitle

Double_t *	fX
	[fNpoints]

Double_t *	fY
	[fNpoints] Data set to be plotted

Double_t *	fZ
	[fNpoints]

Double_t	fZout
	fHistogram bin height for points lying outside the interpolated area

Private Types
enum	EStatusBits { kOldInterpolation = (1ULL << ( 15 )) }

Private Member Functions
void	CreateInterpolator (Bool_t oldInterp)
	Add a TGraphDelaunay in the list of the fHistogram's functions.

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

UInt_t	fUniqueID
	object unique identifier

Bool_t	fUserHisto

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 <TGraph2D.h>

Inheritance diagram for TGraph2D:

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 TGraph2D::EStatusBits

private

Enumerator
kOldInterpolation

Definition at line 69 of file TGraph2D.h.

Constructor & Destructor Documentation

◆ TGraph2D() [1/9]

TGraph2D::TGraph2D ( )

Graph2D default constructor.

Definition at line 242 of file TGraph2D.cxx.

◆ TGraph2D() [2/9]

TGraph2D::TGraph2D ( Int_t n )

Graph2D constructor.

The arrays fX, fY and fZ should be filled via calls to SetPoint

Definition at line 383 of file TGraph2D.cxx.

◆ TGraph2D() [3/9]

TGraph2D::TGraph2D	(	Int_t	n,
		Int_t *	x,
		Int_t *	y,
		Int_t *	z )

Graph2D constructor with three vectors of ints as input.

Definition at line 268 of file TGraph2D.cxx.

◆ TGraph2D() [4/9]

TGraph2D::TGraph2D	(	Int_t	n,
		Float_t *	x,
		Float_t *	y,
		Float_t *	z )

Graph2D constructor with three vectors of floats as input.

Definition at line 285 of file TGraph2D.cxx.

◆ TGraph2D() [5/9]

TGraph2D::TGraph2D	(	Int_t	n,
		Double_t *	x,
		Double_t *	y,
		Double_t *	z )

Graph2D constructor with three vectors of doubles as input.

Definition at line 302 of file TGraph2D.cxx.

◆ TGraph2D() [6/9]

TGraph2D::TGraph2D ( TH2 * h2 )

Graph2D constructor with a TH2 (h2) as input.

Only the h2's bins within the X and Y axis ranges are used. Empty bins, recognized when both content and errors are zero, are excluded.

Definition at line 321 of file TGraph2D.cxx.

◆ TGraph2D() [7/9]

TGraph2D::TGraph2D	(	const char *	name,
		const char *	title,
		Int_t	n,
		Double_t *	x,
		Double_t *	y,
		Double_t *	z )

Graph2D constructor with name, title and three vectors of doubles as input.

name : name of 2D graph (avoid blanks) title : 2D graph title if title is of the form "stringt;stringx;stringy;stringz" the 2D graph title is set to stringt, the x axis title to stringx, the y axis title to stringy,etc

Definition at line 364 of file TGraph2D.cxx.

◆ TGraph2D() [8/9]

TGraph2D::TGraph2D	(	const char *	filename,
		const char *	format = "%lg %lg %lg",
		Option_t *	option = "" )

Graph2D constructor reading input from filename filename is assumed to contain at least three columns of numbers.

For files separated by a specific delimiter different from ' ' and '\t' (e.g. ';' in csv files) you can avoid using %*s to bypass this delimiter by explicitly specify the "option" argument, e.g. option=" \\t,;" for columns of figures separated by any of these characters (' ', '\t', ',', ';') used once (e.g. "1;1") or in a combined way (" 1;,;; 1"). Note in that case, the instantiation is about 2 times slower.

Definition at line 404 of file TGraph2D.cxx.

◆ TGraph2D() [9/9]

TGraph2D::TGraph2D ( const TGraph2D & g )

Graph2D copy constructor.

copy everything apart from the list of contained functions

Definition at line 523 of file TGraph2D.cxx.

◆ ~TGraph2D()

TGraph2D::~TGraph2D ( )

override

TGraph2D destructor.

Definition at line 547 of file TGraph2D.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 TGraph2D::Add	(	TF2 *	f,
		Double_t	c1 = 1 )

virtual

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

Parameters

f	may be a 2-D function TF2 or 3-d function TF3
c1	a scaling factor, 1 by default

Definition at line 645 of file TGraph2D.cxx.

◆ AddPoint()

virtual void TGraph2D::AddPoint	(	Double_t	x,
		Double_t	y,
		Double_t	z )

inlinevirtual

Append a new point to the graph.

Definition at line 91 of file TGraph2D.h.

◆ 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.

◆ 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 TGraph2D::Apply ( TF2 * f )

virtual

Apply function f to all the data points f may be a 2-D function TF2 or 3-d function TF3 The Z values of the 2D graph are replaced by the new values computed using the function.

Definition at line 661 of file TGraph2D.cxx.

◆ Browse()

void TGraph2D::Browse ( TBrowser * )

overridevirtual

Browse.

Reimplemented from TObject.

Definition at line 674 of file TGraph2D.cxx.

◆ Build()

void TGraph2D::Build ( Int_t n )

protected

Creates the 2D graph basic data structure.

Definition at line 599 of file TGraph2D.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.

◆ Class()

static TClass * TGraph2D::Class ( )

static

Returns: TClass describing this class

◆ Class_Name()

static const char * TGraph2D::Class_Name ( )

static

Returns: Name of this class

◆ Class_Version()

static constexpr Version_t TGraph2D::Class_Version ( )

inlinestaticconstexpr

Returns: Version of this class

Definition at line 171 of file TGraph2D.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 TGraph2D::Clear ( Option_t * option = "" )

overridevirtual

Free all memory allocated by this object.

Reimplemented from TObject.

Definition at line 684 of file TGraph2D.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.

◆ 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.

◆ CreateInterpolator()

void TGraph2D::CreateInterpolator ( Bool_t oldInterp )

private

Add a TGraphDelaunay in the list of the fHistogram's functions.

Definition at line 974 of file TGraph2D.cxx.

◆ DeclFileName()

static const char * TGraph2D::DeclFileName ( )

inlinestatic

Returns: Name of the file containing the class declaration

Definition at line 171 of file TGraph2D.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.

◆ DirectoryAutoAdd()

void TGraph2D::DirectoryAutoAdd ( TDirectory * dir )

virtual

Registration of the graph to the given directory.

This callback is used to register a TGraph2D to the current directory when a TKey is read or an object is being cloned using TDirectory::CloneObject().

Definition at line 716 of file TGraph2D.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 TGraph2D::DistancetoPrimitive	(	Int_t	px,
		Int_t	py )

overridevirtual

Computes distance from point px,py to a graph.

Reimplemented from TObject.

Definition at line 730 of file TGraph2D.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.

◆ Draw()

void TGraph2D::Draw ( Option_t * option = "P0" )

overridevirtual

Specific drawing options can be used to paint a TGraph2D:

"TRI" : The Delaunay triangles are drawn using filled area. An hidden surface drawing technique is used. The surface is painted with the current fill area color. The edges of each triangles are painted with the current line color.
"TRIW" : The Delaunay triangles are drawn as wire frame
"TRI1" : The Delaunay triangles are painted with color levels. The edges of each triangles are painted with the current line color.
"TRI2" : the Delaunay triangles are painted with color levels.
"P" : Draw a marker at each vertex
"P0" : Draw a circle at each vertex. Each circle background is white.
"PCOL" : Draw a marker at each vertex. The color of each marker is defined according to its Z position.
"CONT" : Draw contours
"LINE" : Draw a 3D polyline

A TGraph2D can be also drawn with ANY options valid to draw a 2D histogram.

When a TGraph2D is drawn with one of the 2D histogram drawing option, a intermediate 2D histogram is filled using the Delaunay triangles technique to interpolate the data set.

Reimplemented from TObject.

Definition at line 762 of file TGraph2D.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.

◆ 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.

◆ 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

TObjString

Collectable string class.

Definition TObjString.h:28

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

Definition at line 398 of file TObject.cxx.

◆ ExecuteEvent()

void TGraph2D::ExecuteEvent	(	Int_t	event,
		Int_t	px,
		Int_t	py )

overridevirtual

Executes action corresponding to one event.

Reimplemented from TObject.

Definition at line 782 of file TGraph2D.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.

◆ FindObject() [1/2]

TObject * TGraph2D::FindObject ( const char * name ) const

overridevirtual

search object named name in the list of functions

Reimplemented from TObject.

Definition at line 791 of file TGraph2D.cxx.

◆ FindObject() [2/2]

TObject * TGraph2D::FindObject ( const TObject * obj ) const

overridevirtual

search object obj in the list of functions

Reimplemented from TObject.

Definition at line 800 of file TGraph2D.cxx.

◆ Fit() [1/2]

TFitResultPtr TGraph2D::Fit	(	const char *	fname,
		Option_t *	option = "",
		Option_t *	goption = "" )

virtual

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 and poln are automatically created by ROOT.

Note that using a global function is not thread safe. In this case, use the overload TGraph2D::Fit(TF2 *, Option_t *, Option_t *) with a locally created function.

For more details about fitting a TGraph, see TGraph::Fit().

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

Definition at line 821 of file TGraph2D.cxx.

◆ Fit() [2/2]

TFitResultPtr TGraph2D::Fit	(	TF2 *	f2,
		Option_t *	option = "",
		Option_t *	goption = "" )

virtual

Fits this 2D graph with function f2.

f2 is an already predefined function created by TF2.

See TGraph::Fit for the available fitting options and fitting notes

Definition at line 848 of file TGraph2D.cxx.

◆ FitPanel()

void TGraph2D::FitPanel ( )

virtual

Display a GUI panel with all graph fit options.

See class TFitEditor for example

Definition at line 867 of file TGraph2D.cxx.

◆ GetContourList()

TList * TGraph2D::GetContourList ( Double_t contour )

Returns the X and Y graphs building a contour.

A contour level may consist in several parts not connected to each other. This function returns them in a graphs' list.

Definition at line 926 of file TGraph2D.cxx.

◆ GetDirectory()

TDirectory * TGraph2D::GetDirectory ( ) const

inline

Definition at line 106 of file TGraph2D.h.

◆ 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.

◆ GetErrorX()

Double_t TGraph2D::GetErrorX ( Int_t bin ) const

virtual

This function is called by Graph2DFitChisquare.

It always returns a negative value. Real implementation in TGraph2DErrors

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 945 of file TGraph2D.cxx.

◆ GetErrorY()

Double_t TGraph2D::GetErrorY ( Int_t bin ) const

virtual

This function is called by Graph2DFitChisquare.

It always returns a negative value. Real implementation in TGraph2DErrors

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 955 of file TGraph2D.cxx.

◆ GetErrorZ()

Double_t TGraph2D::GetErrorZ ( Int_t bin ) const

virtual

This function is called by Graph2DFitChisquare.

It always returns a negative value. Real implementation in TGraph2DErrors

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 965 of file TGraph2D.cxx.

◆ GetEX()

virtual Double_t * TGraph2D::GetEX ( ) const

inlinevirtual

Reimplemented in TGraph2DErrors.

Definition at line 125 of file TGraph2D.h.

◆ GetEXhigh()

virtual Double_t * TGraph2D::GetEXhigh ( ) const

inlinevirtual

Reimplemented in TGraph2DAsymmErrors.

Definition at line 129 of file TGraph2D.h.

◆ GetEXlow()

virtual Double_t * TGraph2D::GetEXlow ( ) const

inlinevirtual

Reimplemented in TGraph2DAsymmErrors.

Definition at line 128 of file TGraph2D.h.

◆ GetEY()

virtual Double_t * TGraph2D::GetEY ( ) const

inlinevirtual

Reimplemented in TGraph2DErrors.

Definition at line 126 of file TGraph2D.h.

◆ GetEYhigh()

virtual Double_t * TGraph2D::GetEYhigh ( ) const

inlinevirtual

Reimplemented in TGraph2DAsymmErrors.

Definition at line 131 of file TGraph2D.h.

◆ GetEYlow()

virtual Double_t * TGraph2D::GetEYlow ( ) const

inlinevirtual

Reimplemented in TGraph2DAsymmErrors.

Definition at line 130 of file TGraph2D.h.

◆ GetEZ()

virtual Double_t * TGraph2D::GetEZ ( ) const

inlinevirtual

Reimplemented in TGraph2DErrors.

Definition at line 127 of file TGraph2D.h.

◆ GetEZhigh()

virtual Double_t * TGraph2D::GetEZhigh ( ) const

inlinevirtual

Reimplemented in TGraph2DAsymmErrors.

Definition at line 133 of file TGraph2D.h.

◆ GetEZlow()

virtual Double_t * TGraph2D::GetEZlow ( ) const

inlinevirtual

Reimplemented in TGraph2DAsymmErrors.

Definition at line 132 of file TGraph2D.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()

TF2 * TGraph2D::GetFunction ( const char * name ) const

Return pointer to function with name.

Functions such as TGraph2D::Fit store the fitted function in the list of functions of this graph.

Definition at line 1001 of file TGraph2D.cxx.

◆ GetHistogram()

TH2D * TGraph2D::GetHistogram ( Option_t * option = "" )

By default returns a pointer to the Delaunay histogram.

If fHistogram doesn't exist, books the 2D histogram fHistogram with a margin around the hull. Calls TGraphDelaunay::Interpolate at each bin centre to build up an interpolated 2D histogram.

If the "empty" option is selected, returns an empty histogram booked with the limits of fX, fY and fZ. This option is used when the data set is drawn with markers only. In that particular case there is no need to find the Delaunay triangles.

By default use the new interpolation routine based on Triangles If the option "old" the old interpolation is used

Definition at line 1020 of file TGraph2D.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 * TGraph2D::GetListOfFunctions ( ) const

inline

Definition at line 111 of file TGraph2D.h.

◆ GetMargin()

Double_t TGraph2D::GetMargin ( ) const

inline

Definition at line 115 of file TGraph2D.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 TGraph2D::GetMaximum ( ) const

inline

Definition at line 116 of file TGraph2D.h.

◆ GetMinimum()

Double_t TGraph2D::GetMinimum ( ) const

inline

Definition at line 117 of file TGraph2D.h.

◆ GetN()

Int_t TGraph2D::GetN ( ) const

inline

Definition at line 121 of file TGraph2D.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.

◆ GetNpx()

Int_t TGraph2D::GetNpx ( ) const

inline

Definition at line 108 of file TGraph2D.h.

◆ GetNpy()

Int_t TGraph2D::GetNpy ( ) const

inline

Definition at line 109 of file TGraph2D.h.

◆ GetObjectInfo()

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

virtualinherited

Returns string containing info about the object at position (px,py).

This method is typically overridden by classes of which the objects can report peculiarities for different positions. Returned string will be re-used (lock in MT environment).

Reimplemented in TGeoNode, TGeoVolume, TGeoTrack, TASImage, TColorWheel, TAxis3D, TNode, TGL5DDataSet, TGLHistPainter, TGLParametricEquation, TGLTH3Composition, TF1, TF2, TGraph, TH1, THistPainter, TPaletteAxis, TFileDrawMap, TParallelCoordVar, and TVirtualHistPainter.

Definition at line 491 of file TObject.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.

◆ GetPoint()

Int_t TGraph2D::GetPoint	(	Int_t	i,
		Double_t &	x,
		Double_t &	y,
		Double_t &	z ) const

virtual

Get x, y and z values for point number i.

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

Definition at line 1237 of file TGraph2D.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 * TGraph2D::GetX ( ) const

inline

Definition at line 122 of file TGraph2D.h.

◆ GetXaxis()

TAxis * TGraph2D::GetXaxis ( ) const

Get x axis of the graph.

Definition at line 891 of file TGraph2D.cxx.

◆ GetXmax()

Double_t TGraph2D::GetXmax ( ) const

Returns the X maximum.

Definition at line 1171 of file TGraph2D.cxx.

◆ GetXmaxE()

virtual Double_t TGraph2D::GetXmaxE ( ) const

inlinevirtual

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 140 of file TGraph2D.h.

◆ GetXmin()

Double_t TGraph2D::GetXmin ( ) const

Returns the X minimum.

Definition at line 1182 of file TGraph2D.cxx.

◆ GetXminE()

virtual Double_t TGraph2D::GetXminE ( ) const

inlinevirtual

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 141 of file TGraph2D.h.

◆ GetY()

Double_t * TGraph2D::GetY ( ) const

inline

Definition at line 123 of file TGraph2D.h.

◆ GetYaxis()

TAxis * TGraph2D::GetYaxis ( ) const

Get y axis of the graph.

Definition at line 902 of file TGraph2D.cxx.

◆ GetYmax()

Double_t TGraph2D::GetYmax ( ) const

Returns the Y maximum.

Definition at line 1193 of file TGraph2D.cxx.

◆ GetYmaxE()

virtual Double_t TGraph2D::GetYmaxE ( ) const

inlinevirtual

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 142 of file TGraph2D.h.

◆ GetYmin()

Double_t TGraph2D::GetYmin ( ) const

Returns the Y minimum.

Definition at line 1204 of file TGraph2D.cxx.

◆ GetYminE()

virtual Double_t TGraph2D::GetYminE ( ) const

inlinevirtual

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 143 of file TGraph2D.h.

◆ GetZ()

Double_t * TGraph2D::GetZ ( ) const

inline

Definition at line 124 of file TGraph2D.h.

◆ GetZaxis()

TAxis * TGraph2D::GetZaxis ( ) const

Get z axis of the graph.

Definition at line 913 of file TGraph2D.cxx.

◆ GetZmax()

Double_t TGraph2D::GetZmax ( ) const

Returns the Z maximum.

Definition at line 1215 of file TGraph2D.cxx.

◆ GetZmaxE()

virtual Double_t TGraph2D::GetZmaxE ( ) const

inlinevirtual

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 144 of file TGraph2D.h.

◆ GetZmin()

Double_t TGraph2D::GetZmin ( ) const

Returns the Z minimum.

Definition at line 1226 of file TGraph2D.cxx.

◆ GetZminE()

virtual Double_t TGraph2D::GetZminE ( ) const

inlinevirtual

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 145 of file TGraph2D.h.

◆ 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)

ROOT::CallRecursiveRemoveIfNeeded

void CallRecursiveRemoveIfNeeded(TObject &obj)

call RecursiveRemove for obj if gROOT is valid and obj.TestBit(kMustCleanup) is true.

Definition TROOT.h:406

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.

TNamed::Hash

ULong_t Hash() const override

Return hash value for this object.

Definition TNamed.h:51

TObject

Mother of all ROOT objects.

Definition TObject.h:42

TObject::Error

virtual void Error(const char *method, const char *msgfmt,...) const

Issue error message.

Definition TObject.cxx:1098

TROOT::RecursiveRemove

void RecursiveRemove(TObject *obj) override

Recursively remove this object from the list of Cleanups.

Definition TROOT.cxx:2651

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.

◆ 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.

◆ Interpolate()

Double_t TGraph2D::Interpolate	(	Double_t	x,
		Double_t	y )

Finds the z value at the position (x,y) thanks to the Delaunay interpolation.

Definition at line 1251 of file TGraph2D.cxx.

◆ InvertBit()

void TObject::InvertBit ( UInt_t f )

inlineinherited

Definition at line 206 of file TObject.h.

◆ IsA()

TClass * TGraph2D::IsA ( ) const

inlineoverridevirtual

Returns: TClass describing current object

Reimplemented from TObject.

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 171 of file TGraph2D.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.

◆ 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.

◆ 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.

◆ 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.

◆ 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.

◆ 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.

◆ operator=()

TGraph2D & TGraph2D::operator= ( const TGraph2D & g )

Graph2D operator "=".

Definition at line 556 of file TGraph2D.cxx.

◆ Paint()

void TGraph2D::Paint ( Option_t * option = "" )

overridevirtual

Paints this 2D graph with its current attributes.

Reimplemented from TObject.

Definition at line 1288 of file TGraph2D.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 TGraph2D::Print ( Option_t * chopt = "" ) const

overridevirtual

Print 2D graph values.

Reimplemented from TObject.

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 1330 of file TGraph2D.cxx.

◆ Project()

TH1 * TGraph2D::Project ( Option_t * option = "x" ) const

Projects a 2-d graph into 1 or 2-d histograms depending on the option parameter.

option may contain a combination of the characters x,y,z:

option = "x" return the x projection into a TH1D histogram
option = "y" return the y projection into a TH1D histogram
option = "xy" return the x versus y projection into a TH2D histogram
option = "yx" return the y versus x projection into a TH2D histogram

Definition at line 1347 of file TGraph2D.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 TGraph2D::RecursiveRemove ( TObject * obj )

overridevirtual

Recursively remove object from the list of functions.

Reimplemented from TObject.

Definition at line 1465 of file TGraph2D.cxx.

◆ RemoveDuplicates()

Int_t TGraph2D::RemoveDuplicates ( )

Deletes duplicated points.

The Delaunay triangulation algorithm assumes that each (x, y) coordinate corresponds to a unique z value, meaning duplicate (x, y) points are not allowed. Consequently, when using drawing options that rely on this algorithm (e.g., TRI, SURF, etc.), a warning may appear instructing you to remove duplicates. This function provides a way to handle such duplicates.

Example:

g->RemoveDuplicates();

g->Draw("TRI1");

Definition at line 1445 of file TGraph2D.cxx.

◆ RemovePoint()

Int_t TGraph2D::RemovePoint ( Int_t ipoint )

Deletes point number ipoint.

Definition at line 1479 of file TGraph2D.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 TObject::SaveAs	(	const char *	filename = "",
		Option_t *	option = "" ) const

virtualinherited

Save this object in the file specified by filename.

if "filename" contains ".root" the object is saved in filename as root binary file.
if "filename" contains ".xml" the object is saved in filename as a xml ascii file.
if "filename" contains ".cc" the object is saved in filename as C code independent from ROOT. The code is generated via SavePrimitive(). Specific code should be implemented in each object to handle this option. Like in TF1::SavePrimitive().
otherwise the object is written to filename as a CINT/C++ script. The C++ code to rebuild this object is generated via SavePrimitive(). The "option" parameter is passed to SavePrimitive. By default it is an empty string. It can be used to specify the Draw option in the code generated by SavePrimitive.

The function is available via the object context menu.

Reimplemented in TSpline, TFolder, TGeoVolume, TClassTree, TPad, TPaveClass, TGObject, TSpline3, TSpline5, ROOT::Experimental::XRooFit::xRooNode, TTreePerfStats, TVirtualPad, TGraph, and TH1.

Definition at line 708 of file TObject.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.

◆ 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 TGraph2D::SavePrimitive	(	std::ostream &	out,
		Option_t *	option = "" )

overridevirtual

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

Reimplemented from TObject.

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 1501 of file TGraph2D.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 TGraph2D::Scale	(	Double_t	c1 = 1.,
		Option_t *	option = "z" )

virtual

Multiply the values of a TGraph2D by a constant c1.

If option contains "x" the x values are scaled If option contains "y" the y values are scaled If option contains "z" the z values are scaled If option contains "xyz" all three x, y and z values are scaled

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 1540 of file TGraph2D.cxx.

◆ Set()

void TGraph2D::Set ( Int_t n )

virtual

Set number of points in the 2D graph.

Existing coordinates are preserved. New coordinates above fNpoints are preset to 0.

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 1562 of file TGraph2D.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.

◆ SetDirectory()

void TGraph2D::SetDirectory ( TDirectory * dir )

virtual

By default when an 2D graph is created, it is added to the list of 2D graph objects in the current directory in memory.

This method removes reference to this 2D graph from current directory and add reference to new directory dir. dir can be 0 in which case the 2D graph does not belong to any directory.

Definition at line 1578 of file TGraph2D.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.

◆ 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.

◆ SetHistogram()

void TGraph2D::SetHistogram	(	TH2 *	h,
		Option_t *	option = "" )

virtual

Sets the histogram to be filled.

If the 2D graph needs to be save in a TFile the following set should be followed to read it back:

Create TGraph2D
Call g->SetHistogram(h), and do whatever you need to do
Save g and h to the TFile, exit
Open the TFile, retrieve g and h
Call h->SetDirectory(0)
Call g->SetHistogram(h) again
Carry on as normal

By default use the new interpolation routine based on Triangles If the option "old" the old interpolation is used

Definition at line 1602 of file TGraph2D.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.

◆ SetMargin()

void TGraph2D::SetMargin ( Double_t m = 0.1 )

Sets the extra space (in %) around interpolated area for the 2D histogram.

Definition at line 1619 of file TGraph2D.cxx.

◆ SetMarginBinsContent()

void TGraph2D::SetMarginBinsContent ( Double_t z = 0. )

Sets the histogram bin height for points lying outside the TGraphDelaunay convex hull ie: the bins in the margin.

Definition at line 1639 of file TGraph2D.cxx.

◆ 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 TGraph2D::SetMaximum ( Double_t maximum = -1111 )

Set maximum.

Definition at line 1653 of file TGraph2D.cxx.

◆ SetMaxIter()

void TGraph2D::SetMaxIter ( Int_t n = 100000 )

inline

Definition at line 163 of file TGraph2D.h.

◆ SetMinimum()

void TGraph2D::SetMinimum ( Double_t minimum = -1111 )

Set minimum.

Definition at line 1664 of file TGraph2D.cxx.

◆ SetName()

void TGraph2D::SetName ( const char * name )

overridevirtual

Changes the name of this 2D graph.

Reimplemented from TNamed.

Definition at line 1675 of file TGraph2D.cxx.

◆ SetNameTitle()

void TGraph2D::SetNameTitle	(	const char *	name,
		const char *	title )

overridevirtual

Change the name and title of this 2D graph.

Reimplemented from TNamed.

Definition at line 1689 of file TGraph2D.cxx.

◆ SetNpx()

void TGraph2D::SetNpx ( Int_t npx = 40 )

Sets the number of bins along X used to draw the function.

Definition at line 1703 of file TGraph2D.cxx.

◆ SetNpy()

void TGraph2D::SetNpy ( Int_t npx = 40 )

Sets the number of bins along Y used to draw the function.

Definition at line 1725 of file TGraph2D.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.

◆ SetPoint()

void TGraph2D::SetPoint	(	Int_t	n,
		Double_t	x,
		Double_t	y,
		Double_t	z )

virtual

Sets point number n.

If n is greater than the current size, the arrays are automatically extended.

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 1749 of file TGraph2D.cxx.

◆ SetTitle()

void TGraph2D::SetTitle ( const char * title = "" )

overridevirtual

Sets the 2D graph title.

This method allows to change the global title and the axis' titles of a 2D graph. If g is the 2D graph one can do:

g->SetTitle("Graph title; X axis title; Y axis title; Z axis title");

Reimplemented from TNamed.

Definition at line 1796 of file TGraph2D.cxx.

◆ SetUniqueID()

void TObject::SetUniqueID ( UInt_t uid )

virtualinherited

Set the unique object id.

Definition at line 899 of file TObject.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.

◆ Streamer()

void TGraph2D::Streamer ( TBuffer & b )

overridevirtual

Stream a class object.

Reimplemented from TObject.

Reimplemented in TGraph2DAsymmErrors, and TGraph2DErrors.

Definition at line 1806 of file TGraph2D.cxx.

◆ StreamerNVirtual()

void TGraph2D::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b )

inline

Definition at line 171 of file TGraph2D.h.

◆ 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.

◆ UseCurrentStyle()

void TObject::UseCurrentStyle ( )

virtualinherited

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

Reimplemented in TCanvas, TPad, TFrame, TPaveStats, TPaveText, TAxis3D, TGraph, TH1, and TTree.

Definition at line 909 of file TObject.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.

Member Data Documentation

◆ fBits

UInt_t TObject::fBits

privateinherited

bit field status word

Definition at line 47 of file TObject.h.

◆ fDelaunay

TObject* TGraph2D::fDelaunay

protected

! Pointer to Delaunay interpolator object

Definition at line 59 of file TGraph2D.h.

◆ fDirectory

TDirectory* TGraph2D::fDirectory

protected

!Pointer to directory holding this 2D graph

Definition at line 60 of file TGraph2D.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* TGraph2D::fFunctions

protected

Pointer to list of functions (fits and user)

Definition at line 57 of file TGraph2D.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

TH2D* TGraph2D::fHistogram

protected

!2D histogram of z values linearly interpolated on the triangles

Definition at line 58 of file TGraph2D.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.

◆ fMargin

Double_t TGraph2D::fMargin

protected

Extra space (in %) around interpolated area for fHistogram.

Definition at line 55 of file TGraph2D.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 TGraph2D::fMaximum

protected

Maximum value for plotting along z.

Definition at line 54 of file TGraph2D.h.

◆ fMaxIter

Int_t TGraph2D::fMaxIter

protected

Maximum number of iterations to find Delaunay triangles.

Definition at line 48 of file TGraph2D.h.

◆ fMinimum

Double_t TGraph2D::fMinimum

protected

Minimum value for plotting along z.

Definition at line 53 of file TGraph2D.h.

◆ fName

TString TNamed::fName

protectedinherited

Definition at line 32 of file TNamed.h.

◆ fNpoints

Int_t TGraph2D::fNpoints

protected

Number of points in the data set.

Definition at line 45 of file TGraph2D.h.

◆ fNpx

Int_t TGraph2D::fNpx

protected

Number of bins along X in fHistogram.

Definition at line 46 of file TGraph2D.h.

◆ fNpy

Int_t TGraph2D::fNpy

protected

Number of bins along Y in fHistogram.

Definition at line 47 of file TGraph2D.h.

◆ fPainter

TVirtualHistPainter* TGraph2D::fPainter

protected

!Pointer to histogram painter

Definition at line 61 of file TGraph2D.h.

◆ fSize

Int_t TGraph2D::fSize

protected

!Real size of fX, fY and fZ

Definition at line 49 of file TGraph2D.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.

◆ fUserHisto

Bool_t TGraph2D::fUserHisto

private

Definition at line 67 of file TGraph2D.h.

◆ fX

Double_t* TGraph2D::fX

protected

[fNpoints]

Definition at line 50 of file TGraph2D.h.

◆ fY

Double_t* TGraph2D::fY

protected

[fNpoints] Data set to be plotted

Definition at line 51 of file TGraph2D.h.

◆ fZ

Double_t* TGraph2D::fZ

protected

[fNpoints]

Definition at line 52 of file TGraph2D.h.

◆ fZout

Double_t TGraph2D::fZout

protected

fHistogram bin height for points lying outside the interpolated area

Definition at line 56 of file TGraph2D.h.

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

hist/hist/inc/TGraph2D.h
hist/hist/src/TGraph2D.cxx

Creating a TGraph2D

Drawing options

Examples

SURF1 Example

Fitting Example

PCOL Example

Definition of the Delaunay triangulation (After B. Delaunay)

Public Types

Public Member Functions

Static Public Member Functions

Protected Types

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Private Types

Private Member Functions

Static Private Member Functions

Private Attributes

Static Private Attributes

Member Enumeration Documentation

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ EDeprecatedStatusBits

◆ EStatusBits

Constructor & Destructor Documentation

◆ TGraph2D() [1/9]

◆ TGraph2D() [2/9]

◆ TGraph2D() [3/9]

◆ TGraph2D() [4/9]

◆ TGraph2D() [5/9]

◆ TGraph2D() [6/9]

◆ TGraph2D() [7/9]

◆ TGraph2D() [8/9]

◆ TGraph2D() [9/9]

◆ ~TGraph2D()

Member Function Documentation

◆ AbstractMethod()

◆ Add()

◆ AddPoint()

◆ AddToTObjectTable()

◆ AppendPad()

◆ Apply()

◆ Browse()

◆ Build()

◆ CheckedHash()

◆ Class()

◆ Class_Name()

◆ Class_Version()

◆ ClassName()

◆ Clear()

◆ Clone()

◆ Compare()

◆ Copy() [1/4]

◆ Copy() [2/4]

◆ Copy() [3/4]

◆ Copy() [4/4]

◆ CreateInterpolator()

◆ DeclFileName()

◆ Delete()

◆ DirectoryAutoAdd()

◆ DistancetoLine()

◆ DistancetoPrimitive()

◆ DoError()

◆ Draw()

◆ DrawClass()

◆ DrawClone()

◆ Dump()

◆ Error()

◆ Execute() [1/2]

◆ Execute() [2/2]

◆ ExecuteEvent()

◆ Fatal()

◆ FillBuffer()

◆ FindObject() [1/2]

◆ FindObject() [2/2]

◆ Fit() [1/2]

◆ Fit() [2/2]

◆ FitPanel()

◆ GetContourList()