Sorry if this arrives twice... Not sure if root.cern.ch handles the list anymore... -----Original Message----- From: Dubois, Richard Sent: Wednesday, April 16, 2003 9:00 PM To: 'Root Discussion' Subject: pruning events in a tree I'd like to make a copy of a tree, but excise events (not branches) that fail some cut. It looks like using TTree::CloneTree(0) to start off, followed by TTree::CopyTree("","",1,ievent) to copy ievent (if it passes the cuts) would do the trick. I'm looking for a generic solution so I don't have to tell Root much about the new tree. Is that a pipe dream? :-) There is a note about setting the branches for the TTree in the doc. Is this referring to the original or cloned tree? When I try this, I get an output file, but it looks like just a header. Is there a recipe for doing this? 3.04.02 on RH 7.2. Thanks, Richard -- Richard Dubois Stanford Linear Accelerator Center Stanford, CA 650-926-3824 650-926-8616 (FAX) http://www.slac.stanford.edu/~richard
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