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movepalette.C File Reference

Detailed Description

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When an histogram is drawn with the option COLZ, a palette is automatically drawn vertically on the right side of the plot. It is possible to move and resize this vertical palette as shown on the left plot. The right plot demonstrates that, when the width of the palette is larger than its height, the palette is automatically drawn horizontally.

void movepalette()
auto c = new TCanvas("", "",0,0,1100,550);
auto h1 = new TH2D("h1","h1",40,-4,4,40,-20,20);
auto h2 = new TH2D("h2","h2",40,-4,4,40,-20,20);
float px, py;
for (int i = 0; i < 25000; i++) {
gRandom->Rannor(px,py); h1->Fill(px,5*py);
gRandom->Rannor(px,py); h2->Fill(px,5*py);
TPad *p1 = (TPad *)c->cd(1);
TPad *p2 = (TPad *)c->cd(2);
auto palette1 = new TPaletteAxis(4.05,-15,4.5,15,h1);
auto palette2 = new TPaletteAxis(-3.,-25,3.,-23,h2);
p1->cd(); h1->Draw("colz");
p2->cd(); h2->Draw("colz");
#define c(i)
Definition RSha256.hxx:101
R__EXTERN TRandom * gRandom
Definition TRandom.h:62
R__EXTERN TStyle * gStyle
Definition TStyle.h:433
virtual void SetBottomMargin(Float_t bottommargin)
Set Pad bottom margin in fraction of the pad height.
Definition TAttPad.cxx:99
virtual void SetRightMargin(Float_t rightmargin)
Set Pad right margin in fraction of the pad width.
Definition TAttPad.cxx:119
The Canvas class.
Definition TCanvas.h:23
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
TList * GetListOfFunctions() const
Definition TH1.h:243
2-D histogram with a double per channel (see TH1 documentation)}
Definition TH2.h:301
void Add(TObject *obj) override
Definition TList.h:81
The most important graphics class in the ROOT system.
Definition TPad.h:28
TVirtualPad * cd(Int_t subpadnumber=0) override
Set Current pad.
Definition TPad.cxx:597
The palette painting class.
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 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
void Draw(Option_t *option="") override=0
Default Draw method for all objects.
TH1F * h1
Definition legend1.C:5
Olivier Couet

Definition in file movepalette.C.