Hello everyone i’m a total newbie to ROOT and i’m trying to learn it all by myself, and i have faced a problem of overplaying 3 histograms. I’ve seen many examples and gotten macros, but compiling macros show no result with no error message. I even downloaded other people’s root files and run them f…

{ TFile *f; TCanvas *c; f = TFile::Open("general.root"); // f->ls(); f->GetObject("C0000", c); // c->ls(); TH1F *h1 = (TH1F*)(c->GetPrimitive(" proton ")->Clone("general")); h1->SetDirectory(gROOT); delete c; delete f; // no longer needed f = TFile::Open("fragmentation.root")…

How to put two or more histograms in one canvas?

ROOT

StephanH January 6, 2020, 7:52am 2

To overlay, you need to pass the draw option SAME. See e.g. here: