Hi,
Thank you for the solution and the fast response time. I would like to
point out 2 things:
1. The script which created the analysis class actually was,
{
TChain chain("ntuple");
chain.Add("ntup1.root"); // Ntuple with floats
chain.Add("ntup2.root"); // Ntuple with doubles
ntuple.MakeClass("Analysis");
}
So, the reason floats was declared in the Analysis.h file was because
the 1st file had floats. It would be desirable to have TChain exit with
an error or at least warn the user when there is an incompatibility
between data types in its TFiles.
2. When I change the decalaration of branch types to doubles, the
analysis loop does not correctly see the floats in the 1st file. There
does not seem to be any automatic casting here.
Thanks again,
Dan
On Tue, 2003-03-04 at 13:58, Rene Brun wrote:
> Hi Dan,
>
> I have investigated your problem and found the solution.
> Your first file has a TNtuple (with float variables). Your second file
> has a TNtupleD (with double variables).
> You have generated the header file via TTree::MakeClass on the TNtuple
> file. Then you use it on a TChain combining the two files.
> This is wrong. You should have done the inverse.
><snip>
> Rene Brun
>
> On 4
> Mar 2003, Dan
> Krop wrote:
>
> > Hi,
> > I tried 3.05/02 and the behavior is the same. I've made an even
> > simpler example which requires no external shared libs. It is on the
> > same website:
> >
> > http://dustbunny.physics.indiana.edu/~dkrop/root_problems
> >
> > Note that the location of the ntuple files must be correctly declared in
> > the header file before testing. I would be interested if anybody can
> > reproduce the behavior I have seen.
> >
> > Thanks again,
> > Dan
> >
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