thstack2palettecolor.C File Reference

Detailed Description

Palette coloring for 2D histograms' stack is activated thanks to the option PFC (Palette Fill Color).

When this option is given to THStack::Draw the histograms in the THStack get their color from the current color palette defined by gStyle->SetPalette(...). The color is determined according to the number of histograms.

In this example four 2D histograms are displayed with palette coloring. The color of each graph is picked inside the palette number 1.

 
void thstack2palettecolor () {
   gStyle->SetPalette(1);
   auto h1 = new TH2F("h1","h1",20,0,6,20,-4,4);
   auto h2 = new TH2F("h2","h1",20,0,6,20,-4,4);
   auto h3 = new TH2F("h3","h1",20,0,6,20,-4,4);
   auto h4 = new TH2F("h4","h1",20,0,6,20,-4,4);
   auto h5 = new TH2F("h5","h1",20,0,6,20,-4,4);
   h2->Fill(2.,0.,5);
   h3->Fill(3.,0.,10);
   h4->Fill(4.,0.,15);
   h5->Fill(5.,0.,20);
   auto hs = new THStack("hs","Test of palette colored lego stack");
   hs->Add(h1);
   hs->Add(h2);
   hs->Add(h3);
   hs->Add(h4);
   hs->Add(h5);
   hs->Draw("0lego1 PFC");
}

Author

Olivier Couet

Definition in file thstack2palettecolor.C.