I am using h->Scale(double_t) to scale my histogram, for eg. h->Scale(2); doubles each bin count. But the stat box, when I plot the new histogram still gives me the previous no. of entries. for eg. if h(original) was 50 entries when I scale the histogram, shouldn’t the new stat box say 100 entrie…

Wile_E_Coyote July 18, 2018, 6:02pm 2

What is the best way to subtract a single entry or a histogram of entries from another histogram? ROOT

Roughly speaking, the value returned by TH1::GetEntries is how many times you called TH1::Fill and/or TH1::SetBinContent so, it can only “increase”. You can use TH1::SetEntries, if you want to modify it. You can call TH1::ResetStats if you want to “reset” histogram’s statistics (including the “number of entries”) and replace it with values calculates from the actual bins’ content. Unfortunately, how everything gets recalculated (including the “number of entries”) depends also on the actual TH1:…

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Histogram Scaling and Opt Stat box