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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