"Andrew Askew (padley)" wrote: > > Hello Root-meisters! > > I need to find a way to get data (actual NUMBERS) out of a TTree and into > an ASCII file so that I can run an analysis program over it. As strange > as it may sound, I am unable to intuit a way to get this sort of thing OUT > of a TTree. Getting data from an ASCII file INTO a TTree is a well known > solution. The only references I've seen have been to a rather arcane > array of calls to TBranches (ad nausea) and use of the Event class. As I > have a much different list of variables here, so I simply (in a manner of > speaking) need to write my own event class, with its own Track variables > to handle this? > > Andrew Askew Hi Andrew, Just use the TTree::MakeCode() or TTree::MakeClass() to obtain a skeleton with which you can then do whatever you need. -- Cheers, Nick. *----------------------------------------------------------------------* Dr. Nick van Eijndhoven Department of Subatomic Physics email : nick@phys.uu.nl Utrecht University / NIKHEF tel. +31-30-2532331 (direct) P.O. Box 80.000 tel. +31-30-2531492 (secr.) NL-3508 TA Utrecht fax. +31-30-2518689 The Netherlands WWW : http://www.phys.uu.nl/~nick Office : Ornstein lab. 172 ---------------------------------------------------------------------- tel. +41-22-7679751 (direct) CERN PPE Division / ALICE exp. tel. +41-22-7675857 (secr.) CH-1211 Geneva 23 fax. +41-22-7679480 Switzerland CERN beep : 13+7294 Office : B 160 1-012 *----------------------------------------------------------------------*
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