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.
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.
gStyle->SetPalette(1);
auto h1 = new TH2F("h1","h1",20,0,6,20,-4,4);
auto h2 = new TH2F("h2","h2",20,0,6,20,-4,4);
auto h3 = new TH2F("h3","h3",20,0,6,20,-4,4);
auto h4 = new TH2F("h4","h4",20,0,6,20,-4,4);
auto h5 = new TH2F("h5","h5",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");
Info in <TCanvas::MakeDefCanvas>: created default TCanvas with name c1
Draw all canvases
gROOT->GetListOfCanvases()->Draw()