Found the mistake -- I had a TChain loaded as well,
and ROOT took ntp1 from the TChain instead of the
TFile. When I made sure I was in the TFile,
the number of entries was less than 30000, as it
should be.
Sorry about that,
sheila
On Tue, 21 Feb 2006, Wolfgang Menges wrote:
> Hi Sheila,
>
> the number of entries is (in the standard package) the number of
> selected events. This means at least a good best B candiate and a lepton
> candidate. Maybe the lepton candidate must exceed 1 GeV in momentum. But
> the number of entries should be below or equal the number of events in the
> tcl file. So I guess there is something wrong. How is the rest looking?
>
> Cheers,
>
> Wolfgang
>
> On Tue, 21 Feb 2006, Sheila Mclachlin wrote:
>
> >
> > Hello,
> >
> > I produced a bunch of ntuples VubRecoilUser ntuples
> > with 30000 events, using the tcl files made with
> >
> > BbkDatasetTcl -ds dataset -tcl 30000 --splitruns
> >
> > Then I take an ntuple and look at it in root:
> >
> > root [31] TFile f("data/SP-1235-BSemiExcl-R18b-1.root");
> > root [32] ntp1->GetEntries()
> > (const Long64_t)2574210
> >
> > That is much more than 30000 entries.
> >
> > Obviously the number of entries is not the same
> > as the number of events. So what does the number of
> > entries tell me?
> >
> > Thanks,
> >
> > sheila
> >
> >
> >
> >
>
> -----------------------------------------------------------------------------
> Wolfgang Menges
> Queen Mary, University of London SLAC, MS 35
> Mile End Road 2575 Sand Hill Road
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