I want to plot an efficiency (in 2 variables) and it is important that I can distinguish between 0 efficiency and an empty bin. What is the recommended way to do this? All I can think of is to do the division (and fill the values) manually, assigning a very low, non-zero value to 0 bins and leaving …

Thank you all for the input. Given that my primary goal is visualization of a TH2 with the 'COLZ' option, it sounds like my initial suggestion is my best bet. I simply do: effhist = (TH2F*)foundhist->Clone("effhist"); effhist->Divide(genhist); for(int k=0;k<effhist->GetNbinsX(); k++){ …

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How to distinguish 0 from empty histogram bins

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Wile_E_Coyote April 10, 2019, 7:30am 4

Set palette of histogram ROOT

Actually, you could have a signature for “non-empty” bins with “zero contents” … histo1D->Fill(x, 1.e-6); histo1D->Fill(x, -1.e-6); Note: Empty bins are these that have the content equal to zero AND error equal to zero.

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