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histpalettecolor.C File Reference

Detailed Description

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Palette coloring for histogram is activated thanks to the options PFC (Palette Fill Color), PLC (Palette Line Color) and AMC (Palette Marker Color).

When one of these options is given to TH1::Draw the histogram get its color from the current color palette defined by gStyle->SetPalette(...). The color is determined according to the number of objects having palette coloring in the current pad.

In this example five histograms are displayed with palette coloring for lines and and marker. The histograms are drawn with markers and error bars and one can see the color of each histogram is picked inside the default palette kBird.

void histpalettecolor()
auto C = new TCanvas();
auto h1 = new TH1F("h1","Histogram drawn with full circles",100,-4,4);
auto h2 = new TH1F("h2","Histogram drawn with full squares",100,-4,4);
auto h3 = new TH1F("h3","Histogram drawn with full triangles up",100,-4,4);
auto h4 = new TH1F("h4","Histogram drawn with full triangles down",100,-4,4);
auto h5 = new TH1F("h5","Histogram drawn with empty circles",100,-4,4);
TRandom3 rng;
Double_t px,py;
for (Int_t i = 0; i < 25000; i++) {
h2->Fill(px, 8.);
h3->Fill(px, 6.);
h4->Fill(px, 4.);
h5->Fill(px, 2.);
h1->Draw("PLC PMC");
h2->Draw("SAME PLC PMC");
h3->Draw("SAME PLC PMC");
h4->Draw("SAME PLC PMC");
h5->Draw("SAME PLC PMC");
int Int_t
Definition RtypesCore.h:45
const Bool_t kFALSE
Definition RtypesCore.h:101
double Double_t
Definition RtypesCore.h:59
@ kFullTriangleDown
Definition TAttMarker.h:56
@ kFullSquare
Definition TAttMarker.h:55
@ kFullTriangleUp
Definition TAttMarker.h:55
@ kFullCircle
Definition TAttMarker.h:55
@ kOpenCircle
Definition TAttMarker.h:56
R__EXTERN TStyle * gStyle
Definition TStyle.h:433
#define gPad
virtual void SetMarkerStyle(Style_t mstyle=1)
Set the marker style.
Definition TAttMarker.h:40
The Canvas class.
Definition TCanvas.h:23
1-D histogram with a float per channel (see TH1 documentation)}
Definition TH1.h:578
virtual Int_t Fill(Double_t x)
Increment bin with abscissa X by 1.
Definition TH1.cxx:3325
void Draw(Option_t *option="") override
Draw this histogram with options.
Definition TH1.cxx:3047
Random number generator class based on M.
Definition TRandom3.h:27
virtual void Rannor(Float_t &a, Float_t &b)
Return 2 numbers distributed following a gaussian with mean=0 and sigma=1.
Definition TRandom.cxx:500
void SetOptTitle(Int_t tit=1)
Definition TStyle.h:332
void SetOptStat(Int_t stat=1)
The type of information printed in the histogram statistics box can be selected via the parameter mod...
Definition TStyle.cxx:1636
TH1F * h1
Definition legend1.C:5
Olivier Couet

Definition in file histpalettecolor.C.