Dear ROOTERS, I have a little problem regarding reading ntuples. I have a code below, I have a file which contains 2 ntuples "T1" and "T2". Since i want to draw thw data in a desired range, i place it in histograms. The histograms below are already initialized. My problem is how to save the result in a file where i can view the histograms one by one. What should be added in the code below to save the result in a file? I tried creating a file but its empty. What's wrong with the code below? void NtupleRead() { f = new TFile("test.root","RECREATE"); f1 = new TFile("enw.root","READ"); f1.cd(); cHist = new TCanvas("cHist","Canvas 1",100,100,800,800); cHist->Divide(2,2); cHist->cd(1); T1.Draw("fEvis>>hEvis"); cHist->cd(2); T1.Draw("fPt>>hPt"); cHist->cd(3); T2.Draw("fPl>>hPl"); cHist->cd(4); T2.Draw("fNchg>>hNchg"); cHist->Update(); f.Write(); } Dennis Arogancia MSU-IIT
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