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.
Author: Olivier Couet
This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Wednesday, April 17, 2024 at 11:13 AM.
auto c = new TCanvas("", "",0,0,1100,550);
c->Divide(2,1);
gStyle->SetOptStat(0);
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);
p1->SetRightMargin(0.15);
auto palette1 = new TPaletteAxis(4.05,-15,4.5,15,h1);
h1->GetListOfFunctions()->Add(palette1);
p2->SetBottomMargin(0.2);
auto palette2 = new TPaletteAxis(-3.,-25,3.,-23,h2);
h2->GetListOfFunctions()->Add(palette2);
p1->cd(); h1->Draw("colz");
p2->cd(); h2->Draw("colz");
Draw all canvases
gROOT->GetListOfCanvases()->Draw()