Hi Gene,
In the CVS version I have added an optional argument to TChain::AddFile
that you can use to specify an alternative tree name.
Rene Brun
On
Sat, 30 Oct 2004, Gene Van Buren wrote:
> I have set of files containing TTrees. All files in each
> set either have one name (let's call it "ATree") or all
> have a different name ("BTree"). Both TTrees have a
> set of branches in common, so one piece of code that
> analyzes these common branches could use either
> kind of TTree. To access these file sets, I've been
> using a TChain.
>
> Anyone have a good way to automatically handle the
> two possible tree names?
>
> In the past I have made this work by using the name
> "ATree", Add()'ing files, calling LoadTree(0), and
> checking if the result was -4, then changing the name
> of the TChain and its TChainElements to "BTree" and
> trying again. But fEntries is zero after I use Add() to
> add files to the TChain, and I can't recover from that.
>
> -Gene
>
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