Hi,
I have a set of histograms that I combine to a THStack. When
superimposing the THStack with a TH1F I'm unable to suppress the error
bars of the stack. The effect is demonstrated in the little script below
that I addapted from limit.C in the tutorials.
I use the "hist" option to add the histograms to the stack and also draw
the stack with the "hist" option. But the errors are still drawn.
Does somebody know how to get rid of the error bars ?
Thanks,
Martin
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{
// Create some histograms
TH1D* background = new TH1D("background","The expected background",30,-4,4);
TH1D* signal = new TH1D("signal","the expected signal",30,-4,4);
TH1D* data = new TH1D("data","some fake data points",30,-4,4);
background->SetFillColor(48);
signal->SetFillColor(kGreen);
data->SetMarkerStyle(21);
data->SetMarkerColor(kBlue);
// Fill histograms randomly
TRandom r;
Float_t bg,sig,dt;
for (Int_t i = 0; i < 25000; i++) {
bg = r.Gaus(0,1);
sig = r.Gaus(1,.2);
background->Fill(bg,0.02);
signal->Fill(sig,0.001);
}
for (Int_t i = 0; i < 1000; i++) {
dt = r.Gaus(0,1);
data->Fill(dt);
}
THStack *hs = new THStack("hs","Signal and background compared to data...");
hs->Add(background, "hist");
hs->Add(signal, "hist");
data->Draw("P");
hs->Draw("SAME HIST");
}
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