[ROOT] <About reading a .root file>

From: Yang Ruizhe (jet@hep.pku.edu.cn)
Date: Sat Jun 26 2004 - 08:20:02 MEST 

Hi, ROOTers!

I have a problem when reading .root file created by myself.

For example, I have created a .root file called "r.root" storing a TNtuple("test","","x:y")

In the next step, load it by

TFile f("r.root");
TNtuple* n = (TNtuple*) f.Get("test");
Int_t count = n->GetEntries();
for(Int_t i = 0; i<count; i++)
{
  ??????
}

Then, if I want to read exactly the x and y value correspoding to the No. i entry, what should I do? I checked the source code for TNtuple and TTree but could not find the right member function to do this job.

Thank you very much.

Best Regards,
Yang Ruizhe

2004.6.26.

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