Hello, I've got a little problem which I do not understand. I want to do the following: fMyTree->Draw("fPM1HV:fPM2HV"); // It works, it gives a scatter plot TH2* htemp2D = (TH2*)gROOT->FindObject("htemp"); // It works htemp2D->Draw("lego"); // It does not work, gives me a flat histo... On the other hand, for 1D histo it works : fMyTree->Draw("fPM1HV"); TH1* htemp1D = (TH1*)gROOT->FindObject("htemp"); htemp1D->Draw("l"); // This time it works... Why there is a difference between 1D and 2D histo ? Thank you. Cyril Lachaud
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