Hi Annalisa, I suppose you have something similar to the following example. The option "HIST" (as in this example) is the answer to your question. test() { TH1F *histo=new TH1F("sig0","Test!",25,0,100); for (int i=1; i<26; i++){ histo->SetBinContent(i,i); histo->SetBinError(i,sqrt(i)); } histo->Draw(""); histo->Draw("SAME hist *L"); } Cheers, Olivier On Fri, 20 Feb 2004, Annalisa De Caro wrote: > Dear rooters, > > I have a question for you. > > Suppose that you define an histogram (histo3, in the example) as in the following case: > > TH1F *histo1; // read from file > TH1F *histo2; // read from file > > TH1F *histo3; > histo3->Divide(histo1,histo2,1.,1.,"B"); > > How can I draw the histogram histo3 with error bars and with a continue line? > By using the following command: > > histo3->Draw(); > > I see only the error bars and I obtain the same plot by using any drawing option. > > Can you help my? > > Thank you > Annalisa > > -- Org: CERN - European Laboratory for Particle Physics. Mail: 1211 Geneve 23 - Switzerland Mailbox: J25910 E-Mail: Olivier.Couet@cern.ch Phone: +41 22 7676522 WWW: http://cern.ch/Olivier.Couet/ Fax: +41 22 7677155
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