hist027_THStack_palette_color.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 hist027_THStack_palette_color()
{
   auto 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
   auto h1st = new TH1F("h1st", "test hstack", 100, -4, 4);
   h1st->FillRandom("gaus", 20000);
   hs->Add(h1st);
 
   auto h2st = new TH1F("h2st", "test hstack", 100, -4, 4);
   h2st->FillRandom("gaus", 15000);
   hs->Add(h2st);
 
   auto h3st = new TH1F("h3st", "test hstack", 100, -4, 4);
   h3st->FillRandom("gaus", 10000);
   hs->Add(h3st);
 
   // draw the stack
   hs->Draw("pfc nostack");
}

Date

December 2018

Author

Olivier Couet

Definition in file hist027_THStack_palette_color.C.