Tommaso, I do not see any problems using the old version 3.01 on your file. See the result of the following 3 commands in the attachement. root [0] TFile f("pdist.root") root [1] sigp.Draw() root [2] sigp->ProfileX()->Draw("same") Rene Brun Tommaso Chiarusi wrote: > > Hi Rene', > the root file with the histo is in > > /afs/cern.ch/user/c/chiarusi/public/ROOT/pdist.root > > Thanks, > > Tommaso > > > > > > Now : > > > I'm using ROOT 3.01/06. Could it be the reason? > > > > > > Cheers, Tommaso > > > > > > P.S. TH2D::ProjectionXY is not implemented in this version, is it? > >
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