Hi , I have a problem using the TTree:Draw in root 2.24/01. I create a new Histogram: root[0] hRecon = new TH1F("hRecon","hRecon",50,0,60); open a file root[1] f2 = new TFile("/data4/calfiles/mt6125eve08_A.cal.root") now I want to draw part of the tree into the histogram. root[2] Events->Draw("TotalEnergy>>hRecon") Root creates a new canvas which contains a histogram with the data, but the axis range is not from 0 to 60 as defined for the histo "hRecon", but automaticly choosen by TTree::Draw() But when I try to draw the histogram with root[3] hRecon->Draw() the histogram is empty. Thanks, Norbert -- Norbert Danneberg ETH Zurich - Institute for Particle Physics Laboratory for Nuclear Physics Phone.: +41-1-633-2034 Hoenggerberg Fax.: +41-1-633-1067 CH-8093 Zurich ETH Zurich - Institute for Particle Physics Paul Scherrer Institute Phone.: +41-56-310-3284 CH-5232 Villigen PSI Fax.: +41-56-310-4362 email: Norbert.Danneberg@psi.ch
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