Marco Ajello writes: > Dear all, > I have a TH2D contour plot and I want to access the bins coordinates > x and y. How can I do it? > Regards, > Marco > Hi Marco! I don't realy understand what you mean with "access"? Do you want the BinContent() for a point (x,y)? (TH1::GetBinContent(TH1::FindBin(x,y)) or do you want the bin centers for a point (x,y)? x_=h2D->GetXaxis()->GetBinCenter( h2D->GetXaxis()->FindBin(x) ); y_=h2D->GetYaxis()->GetBinCenter( h2D->GetYaxis()->FindBin(y) ); Have a lock at the referene manual under http://root.cern.ch/root/Reference.html, TH2, TH1 A combination of TH1::GetBinContent(), TH1::FindBin(x,y) and TAxis::FindBin(), TAxis::GetBinCenter() should help. Greets Michael
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