RE: [ROOT] TTreeFormula: Should this work?

From: Philippe Canal (pcanal@fnal.gov)
Date: Fri Jun 29 2001 - 17:37:15 MEST

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Hi,

This is supposed to be working in root-3.01.05.  Could you send me you 
root file so that I can reproduce the problem (which might be that 
you 'forgot' to initialize fH .... or ROOT forgot to check for zeros :( ).

Cheers,
Philippe.

-----Original Message-----
From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Mike Kordosky
Sent: Friday, June 29, 2001 1:36 AM
To: ROOTtalk Mailing List
Subject: [ROOT] TTreeFormula: Should this work?


Hi,

I have a tree with a TClonesArray branch, named fSummary.  The array
contains objects of type:

class TestSummary: public TObject{
	private:
			UShort_t fType;
			Double_t fMean;
			Float_t fHV;
			TH1F* fH;
	public:
		TestSummary(): fH(0) { }
	// ... //
}

I am writing this in split mode 2, root-3.01.05.

I find that I can do such things as:

tree->Draw("fSummary[1].fMean");

but not:

tree->Draw("fSummary[3].fH.GetMean()");
tree->Draw("fSummary.fH.GetMean()");

which give a segv.  Is this the expected behaviour? Based on examples I
have found, the problem appears to be the clones array.  Is there any plan
to support such queries in the future?

Mike Kordosky

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