In addition to my previous posting:
In Root version 4.00/06, it is possible to write objects non deriving
from TObject via TDirectory::WriteObject.
See:
http://root.cern.ch/root/htmldoc/TDirectory.html
http://root.cern.ch/root/htmldoc/TDirectory.html#TDirectory:WriteTObject
Rene Brun
Victor Perevoztchikov wrote:
>
> Hi Wolfgang,
> > > kOverwrite flag was the right thing. But that destroyed the information
> > > written in previous steps. Can I TFile::Write("",kOverWrite) more than
> In STAR we use this mode. We use TObject::Write method. But to avoid
> destroying the previous record we each time change the name of key.
> In our case it is some_name.run_number.event_number like
> "datatype.00123.123456"
> Victor
>
> Victor M. Perevoztchikov perev@bnl.gov
> Brookhaven National Laboratory MS 510A PO Box 5000 Upton NY 11973-5000
> tel office : 631-344-7894; fax 631-344-4206;
>
> ----- Original Message -----
> From: "Rene Brun" <Rene.Brun@cern.ch>
> To: "Wolfgang Waltenberger" <walten@qhepu3.oeaw.ac.at>
> Cc: "root talk list" <roottalk@pcroot.cern.ch>
> Sent: Friday, June 04, 2004 9:50 AM
> Subject: Re: [ROOT] cycles
>
> > Hi Wolgang,
> >
> > Instead of TFile::Write, use myobject.Write();
> > ie, write your objects one by one.
> >
> > Rene Brun
> >
> > Wolfgang Waltenberger wrote:
> > >
> > > Dear root mailing list,
> > >
> > > I am writing to a TFile, and I have to write in more than one "go",
> > > i.e. I have multiple TFile::Write() calls.
> > > Now I would like to suppress the different "cycles", so I thought the
> > > kOverwrite flag was the right thing. But that destroyed the information
> > > written in previous steps. Can I TFile::Write("",kOverWrite) more than
> > > once, and keep all the data at the same time?
> > >
> > > Cheers
> > >
> > > Wolfgang
> >
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