Roottalk I made a simpler version of my problem. I forgot to mention that I am running Root 3.03/09 on Linux #include "TH2.h"; #include "TH1.h"; TH2D *exam; void Simple(){ exam = new TH2D("exam","demo",36,-1.8,1.8,36,-180,180); for (int i=0;i<36;i++) { for (int j=0;j<36;j++) { exam->SetBinContent(i+1,j+1,100000); } } exam->Sumw2(); cout << " bin 10,10 = " << exam->GetBinContent(10,10) <<" " << exam->GetBinError(10,10) <<endl; exam->ProjectionX("pro1",10,10,"e"); cout << "projection " << pro1->GetBinContent(10) << " " << pro1->GetBinError(10) << endl; pro1->Draw(); return(); } This code prints *** Start at Date : Wed Dec 4 16:07:41 2002 QAInfo:You are using STAR_LEVEL : dev, ROOT_LEVEL : 3.03.09 and node : rcas6006.rcf.bnl.gov root.exe [0] Processing Simple.C... bin 10,10 = 100000 316.228 projection 100000 100000 <TCanvas::MakeDefCanvas>: created default TCanvas with name c1 Bill Love He was screaming in agony. Fortunately I speak it fluently.
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