Hi Martin, By default TH1::Fit also draws the histogram. You can specify teh drawing options to TH1::Fit, eg instead of h1->Fit("gaus"); h1->Draw("ep"); do: h1->Fit("gaus","","ep"); Rene Brun Martin Weber wrote: > > Dear all, > > why is the order of fitting / drawing important in the example below? I > would expect the graphical output to be equivalent! > > Martin > > isbugorfeature() > { > TCanvas * c1 = new TCanvas("c1", "c1", 600, 800); > c1->Divide(1,2); > TH1F * h1 = new TH1F("h1", "h1", 100, -3, 3); > h1->FillRandom("gaus"); > > c1->cd(1); > h1->Fit("gaus"); > h1->Draw("ep"); > > c1->cd(2); > h1->Draw("ep"); > h1->Fit("gaus"); > }
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