Chris Green wrote: > > Hi, > > Can someone tell me what's wrong with this: > > TH2F *h1 = new TH2F("hf1","Total Cross-sections at 161 GeV",71,19.5,90.5,71,19.5,90.5); > TH2F *h2 = new TH2F(); > h1->Copy(h2); > h2->TNamed("h2","Left-handed Cross-sections at 161 GeV"); > You can do, either: TH2F *h1 = new TH2F("hf1","Total Cross-sections at 161GeV",71,19.5,90.5,71,19.5,90.5); TH2F *h2 = new TH2F(); h1->Copy(*h2); h2->SetName("h2"); h2->SetTitle("Left-handed Cross-sections at 161 GeV"); or: TH2F h1("hf1","Total Cross-sections at 161 GeV",71,19.5,90.5,71,19.5,90.5); TH2F h2(); h1.Copy(h2); h2.SetName("h2"); h2.SetTitle("Left-handed Cross-sections at 161 GeV"); In version 1.00, one can do directly: TH2F h2 = h1; Rene Brun
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