Hi Andres, When using TTree::Draw, you can specify a selection. I suggest you read: -the example at $ROOTSYS/tutorials/ntuple1.C http://root.cern.ch/root/html/examples/ntuple1.C.html -the documentation of TTree::Draw http://root.cern.ch/root/html/src/TTree.cxx.html#TTree:Draw Rene Brun Andres Felipe Osorio Oliveros wrote: > > Dear ROOTers, > > I want to analyze some data obtained from the Isajet simulator using Root. > For this reason I created an intermediate hbook file - a RW-Ntuple- and > then I use h2root to convert this file. I have been able to plot in the > easy way using something like 'h10->Draw("px");'. But I need to do a more > precise analysis for example reading the content of each row at specified > column and selecting data. After reading the tutorials and several pages of > class description I still don't know what to do. > > Thank you for any assistance you can provide. > ( I'm a root novice.) > > Andres Felipe Osorio
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