Hi Andrew! You do not have to write the "Event" class yourself: Just invoke the TTree::MakeClass() method of your TTree object. This will produce the skeleton of the source code of a class suitable for accessing the entries in your TTree. cheers Kurt Kurt Rinnert *** eMail rinnert@ekp.physik.uni-karlsruhe.de On Thu, 29 Jul 1999, 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 > > >
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