Hello, Is there a simple way to rescale the y-axis of a TH1 when you plot it from TTree::Draw()? For example I want to draw a pt spectrum via tree->Draw("pt"). But as 1/pt * dN/dpt not just as dN/dpt. Also, I would like to plot histos from a Tree where each entry has a specific weight w (something like dw/dx). In a loop I would simply say h1->Fill(x_i, w_i);. But I cannot figure out how to do this in the nice way of TTree::Draw(). If TTree::Draw() can't do it, what do you think is the best alternative? Greetings Christoph >> Christoph Ernst Institut fuer Theoretische Physik Johann Wolfgang Goethe-Universitaet Robert-Mayer-Str. 10 60054 Frankfurt/Main Germany e-mail: ernst@th.physik.uni-frankfurt.de Office: Robert-Mayer-Strasse 10, Room 511 Office Phone: 069 - 798 22844 Priv. Phone: 069 - 47 29 88 http://www.th.physik.uni-frankfurt.de/~ernst
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