RE: [ROOT] linked ntuples in ROOT

From: Valeri Fine (fine@bnl.gov)
Date: Mon Jun 28 2004 - 18:33:13 MEST

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You should use 

http://root.cern.ch/root/htmldoc/TFile.html#TFile:Open
method to access the "rfio" files

----
Best regards
                   Valeri


> -----Original Message-----
> From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch] On
> Behalf Of Carmen Iglesias
> Sent: Monday, June 28, 2004 11:35 AM
> To: roottalk@cern.ch
> Subject: [ROOT] linked ntuples in ROOT
> 
> Hi,
> I try to work in a ntuple linked to another in CASTOR, but when I run
> ROOT, it tell me that:
> Error in <TFile::TFile>: file ../ROOT-file/ntuple/pim5h_ela0.root does
not exist
> Error in <TROOT::cd>: Unknown directory CBNT
> Error in <TFile::TFile>: file ntuple.root does not exist
> 
> I have put in the file.C:
> TFile *f = new TFile("../ROOT-file/ntuple/pim5h_ela0.root");
> TTree *t = (TTree *) gDirectory->Get("CBNT/t3333");
> Analisis * aa = new Analisis(t);
> aa->Histo();
> 
> I'm only managed to work with it, if I copy the ntuple to my directory
> from CASTOR with rfcp.
> 
> But these kind of ntuples are very large and I prefer work with it
from
> CASTOR.
> How I can do it?
> 
> Cheers,
> 
> Carmen.
> 
> 
> --
> ***************************************************************
> Carmen Iglesias Escudero
> INSTITUTO DE FÍSICA CORPUSCULAR (IFIC)
> Universidad de Valencia - CSIC
> 
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> EMAIL: iglesias@ific.uv.es
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>
************************************************************************
*

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