Hi, As I see the drawing option for histogram depend from style of filling. Please, look to the result of next macro: //--------------------------------------------------------------------------------------------- class TH1F; TH1F *hid1=0, *hid2=0; void testh() { hid1 = new TH1F("hid1"," id1 ", 10, 0.5, 10.5); hid2 = new TH1F("hid2"," id2 ", 10, 0.5, 10.5); for(Int_t i=1; i<=10; i++) { hid1->Fill(i, 2.*i); hid1->SetBinError(i, 0.2*i); hid2->Fill(i, 1.*i); // hid2->SetBinError(i, 0.1*i); } hid1->Draw("c"); hid2->SetLineColor(2); hid2->Draw("c same"); } //--------------------------------------------------------------------------------------------- Option "c" has effect for hid2 but not for hid1. Is this right behavior? Regards, Aleksei.
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