Hi Ken,
The code generated by MakeClass is correct.
The statement:
Int_t ientry = LoadTree(jentry);
is not necessary if you do not need the entry number in the current Tree.
The statements
fChain->GetEntry(jentry)
and
fChain->GetEntry(ientry)
will give identical results for the first file, but for subsequent
files, only the first statement will give the correct result.
I assume that you use the pro version 3.02/06
Rene Brun
On Sun, 6 Jan 2002,
Ken Bloom wrote:
> OK, I think I understand what is going on now -- at least some of my
> trouble was pilot error, but not all of it, I think. Let's take a look at
> those lines of code again:
>
> for (Int_t jentry=0; jentry<nentries;jentry++) {
> Int_t ientry = LoadTree(jentry); //in case of a TChain, ientry is the entry number in the current file
> nb = fChain->GetEntry(jentry); nbytes += nb;
>
> I didn't read that comment line carefully enough -- it says that ientry is
> the number that I want, as it will point me to the event number in the
> current file. If I do fChain->GetEntry(ientry) instead of
> fChain->GetEntry(jentry), then all is well.
>
> So, maybe the skeleton code made by MakeClass should have
> GetEntry(ientry) instead of GetEntry(jentry)? I think that's the way to go.
> Thanks for the help, best wishes.
>
> Ken
>
> ------------------------------------------------------------------------------
> Ken Bloom, Karma Adjuster Department of Physics
> 734-763-2329 / 734-936-1817 (fax) University of Michigan
> kenbloom@umich.edu http://www.umich.edu/~kenbloom
>
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