Dear Experts, I want to normalize a histogram to area unity. But I am not getting proper plot. Could you please check the code that I am using. void pi0mom() { TChain *t1 = new TChain(); t1->Add("/home/souvik/belle/kek/useroot/evtgen_exp_07_d0kspi0pi0-*.root/h1"); Float_t mult_ds, flag, del…

Wile_E_Coyote June 10, 2019, 3:10pm 2

Different ways of normalizing histograms ROOT

Hi everyone, I’m a new user of both ROOT and RootTalk so please pardon my ignorance. I’ve been trying to normalize several histograms, and when I search in RootTalk, a multitude of ways comes up. How do I know which one is “right”? What is the difference between the following methods? Here are the 4 methods I tried: Method 1: Double_t num = h->GetBinContent(i); Double_t den = h->GetBinWidth(i); Double_t value = 0; if (den!=0) { value = num/den; h->SetBinContent(i,value); } Met…

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How to normalise a histogram to area unity?