Hi, Consider the attached histogram. How would one go about normalising the Y-axis into yield%. I guess I want to divide the data points on Y-axis by the total number of counts (entries). But is there a way to do it in ROOT? Thanks! Edit: Sorry, here is the a snip: [image] Capture Imag…

Not sure what you mean. Isn’t it what this line does? if (integral != 0) h->Scale(100. / integral);

Normalizing counts into yield %

Wile_E_Coyote March 30, 2020, 4:10pm 4

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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