[ROOT] reading ntuple contents

From: Andreas WILDAUER (andreas.wildauer@cern.ch)
Date: Fri Apr 16 2004 - 12:45:14 MEST

Hi all,

I have the following problem:

I want to read some ntuple variable and create a histo out of it.
I do the following:

TFile f("myFile.root")

The ntuple variable is in the dir/key: t3333 and is called signif

so I do:

TH1F* myHist = (TH1F* )f.Get("t3333/signif");

this results in the error:
Error in <TFile::cd>: Object t3333 is not a directory

but all the ntuple variables are in this directory/key. (I can see that in 

I tried certain combinations which worked in the past:

t3333;1/signif -> no error right away but myHisto->Draw() crashes
t3333/signif/1 -> same error as above

Does anyone know how this works?
Thanks in advance

Andreas Wildauer
    CERN/PH ATC, mailbox E25310, CH-1211 Geneva 23, Switzerland
    office 40 3-D06
    email  Andreas.Wildauer@cern.ch
    tel    +41 22 76 71779

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