[ROOT] TTree::Draw Problem in 2.24/01

From: Norbert Danneberg (norbert.danneberg@psi.ch)
Date: Wed Apr 19 2000 - 17:01:04 MEST 

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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