Hi, It looks like when you create a 2d histogram hist, bins in x and y start at 1. When you execute the following command : hist->GetBin(1,1) the result is not 1 (0 would also be ok) but 19 in my case (TH2F, 16*16 bins). Yet : hist->GetBin(0,0) gives 0. But if you try to fill this bin (hist->SetBinContent(0,1.)) and draw the TH2F, you see that this bin is out of range.... Does anybody know if it's a bug or if the previous bins are used for something else ? Thanks a lot. Colin
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