RE: [ROOT] List of Histos

From: Philippe Canal (pcanal@fnal.gov)
Date: Mon Jul 28 2003 - 19:22:08 MEST

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In reply to: Stilianos Kesisoglou: "[ROOT] List of Histos"
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Hi,

You have to look in the proper list.  If the histogram is in a file use
	file->Get
If it is in memory and in a canvas
	canvas->GetListOfPrimitives()->FindObject
etc.

Cheers,
Philippe


-----Original Message-----
From: owner-roottalk@pcroot.cern.ch [mailto:owner-roottalk@pcroot.cern.ch]On
Behalf Of Stilianos Kesisoglou
Sent: Monday, July 28, 2003 5:17 AM
To: roottalk@pcroot.cern.ch
Subject: [ROOT] List of Histos


Hi,

    Is there any way to check if a histogram has been created or not?

    I am thinking something on the same line that I can do for a canvas:

            TCanvas *myCNV = (TCanvas
*)gROOT->GetListOfCanvases()->FindObject("myCNV");
            if (!myCNV) { myCNV = new TCanvas("myCNV","myCNV",920,630); }

    It doesn't seem to work for histograms.

    Thanks!

Stelios.


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