Ilia, There is no limitation on the number of variables in a TNtuple. Usually, one fills a TNtuple via ntuple->Fill(x0,x1,x2,x3,x4,...) if you have more than 15 variables, use the other form ntuple->Fill(Float_t *x) TNtuple is a convenient class for simple cases with variables of type float. If you have more complex cases, use TTree. See Users Guide. Rene Brun Ilia Ravinovich wrote: > > Hi, > > Is there a way to increase number of variables in the N-tuple (as I > ubderstand the maximum now is 11)? > > Thanks, > > Ilia > > ************************************************************************ > * * > * Ilia Ravinovich * > * Department of Particle Physics PPE Division * > * Weizmann Institute of Science Bld 892, 1D-015 * > * Rehovot 76100 CERN, 1211 Geneva * > * ISRAEL Switzerland * > * * > * PHONE : 972 8 9343187 41 22 7676437 * > * FAX : 972 8 9466253 41 22 7677910 * > * E-mail: Ilia.Ravinovich@weizmann.ac.il Ilia.Ravinovich@cern.ch * > * * > ************************************************************************
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