Re: problem with TChain::Merge
Rene Brun (Rene.Brun@cern.ch)
Wed, 09 Sep 1998 00:03:23 +0200
Scott Sampson wrote:
>
> Hi,
>
> I try merging 3 files, each with the same Tree "T":
>
> TChain ch("T");
> ch.Add("f1.root");
> ch.Add("f2.root");
> ch.Add("f3.root");
> ch.Draw("x");
> ch.Merge("all.root");
>
> Now when I do ch.Draw I get the number of expected entries in the
> histogram (the sum of the entries in each of the 3 files), but if I open
> the file "all.root" and make a plot, there are too many entries: the total
> is greater than expected by the number in f1. Further, the values
> themselves look funny. Is there a bug in TChain::Merge? If so, is there an
> macro which could be to do the equivalent? I tried writing one myself, but
> couldn't get it to work. Thanks,
>
> Scott Sampson
>
Scott,
This problem is now fixed in our development version.
Thanks for reporting it.
Rene Brun