hey all, I have a simple enough question. I have a root file that contains 4 NTuples, one for events, one for tracks, one for showers, and one for events info. After I read in the file and ls, I get the following list of ntuples: File** /home/jrieger/eventsr.root TFile* /home/jrieger/eventsr.root KEY: TNtuple evt;1 Event Ntuple KEY: TNtuple trk;1 Track Ntuple KEY: TNtuple shw;1 Shower Ntuple KEY: TNtuple evtinfo;1 Event Info Ntuple What I am wondering is, if I want to loop through the events and get the tracks for each event, how to I extract the information from the ntuple, i.e. read the ntuple. Any help would be appreciated. Thanks. -Jason
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