hist026_THStack_color_scheme.C File Reference

Detailed Description

This example demonstrates how to use the accessible color schemes with THStack.

In this example, the color scheme with six colors is used. It also shows that the grayscale version is an acceptable alternative.

 
void hist026_THStack_color_scheme()
{
   auto c1 = new TCanvas();
   auto hs = new THStack("hs", "Stacked 1D histograms colored using 6-colors scheme");
 
   // Create six 1-d histograms  and add them in the stack
   auto h1st = new TH1F("h1st", "A", 100, -4, 4);
   h1st->FillRandom("gaus", 20000);
   h1st->SetFillColor(kP6Blue);
   hs->Add(h1st);
 
   auto h2st = new TH1F("h2st", "B", 100, -4, 4);
   h2st->FillRandom("gaus", 15000);
   h2st->SetFillColor(kP6Yellow);
   hs->Add(h2st);
 
   auto h3st = new TH1F("h3st", "C", 100, -4, 4);
   h3st->FillRandom("gaus", 10000);
   h3st->SetFillColor(kP6Red);
   hs->Add(h3st);
 
   auto h4st = new TH1F("h4st", "D", 100, -4, 4);
   h4st->FillRandom("gaus", 10000);
   h4st->SetFillColor(kP6Grape);
   hs->Add(h4st);
 
   auto h5st = new TH1F("h5st", "E", 100, -4, 4);
   h5st->FillRandom("gaus", 10000);
   h5st->SetFillColor(kP6Gray);
   hs->Add(h5st);
 
   auto h6st = new TH1F("h6st", "F", 100, -4, 4);
   h6st->FillRandom("gaus", 10000);
   h6st->SetFillColor(kP6Violet);
   hs->Add(h6st);
 
   // draw the stack with colors
   hs->Draw();
   TLegend *l = gPad->BuildLegend(.8, .55, 1., .9, "", "F");
   l->SetLineWidth(0);
   l->SetFillStyle(0);
 
   // draw the stack using gray-scale
   auto c2 = new TCanvas();
   c2->SetGrayscale();
   hs->Draw();
   l->Draw();
}

Date

October 2024

Author

Olivier Couet

Definition in file hist026_THStack_color_scheme.C.