thstackpalettecolor.C File Reference

Detailed Description

Palette coloring for histograms' stack 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 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 histograms are displayed with palette coloring. The color of each histogram is picked inside the palette kOcean.

void thstackpalettecolor()
{
   THStack *hs = new THStack("hs","Stacked 1D histograms colored using kOcean palette");

   gStyle->SetPalette(kOcean);

   // Create three 1-d histograms  and add them in the stack
   TH1F *h1st = new TH1F("h1st","test hstack",100,-4,4);
   h1st->FillRandom("gaus",20000);
   hs->Add(h1st);

   TH1F *h2st = new TH1F("h2st","test hstack",100,-4,4);
   h2st->FillRandom("gaus",15000);
   hs->Add(h2st);

   TH1F *h3st = new TH1F("h3st","test hstack",100,-4,4);
   h3st->FillRandom("gaus",10000);
   hs->Add(h3st);

   // draw the stack
   hs->Draw("pfc nostack");
}

Author

Olivier Couet

Definition in file thstackpalettecolor.C.