Re: Clone Tree with selection

From: Rene Brun (Rene.Brun@cern.ch)
Date: Mon May 03 1999 - 19:18:25 MEST


Olivier Meplan wrote:
> 
> Hi Rooters!
> 
> Is it possible to make a clone of a tree T in a new Tree T with a
> selection given like in the TTree::Draw function ?
> 
> Olivier Meplan

Hi Olivier,
I suggest you look at the tutorials/copytree and copytree2 macros
to get some inspiration. These two macros use TTree::CloneTree.
The default is to copy all entries. Specify
  TTree *newtree = oldtree->CloneTree(0);
then loop on all entries, and fill the newtree with the selected entries
only.
See example of loop at the end of TTree::CloneTree.

Rene Brun



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