Hi Dongwook,
There are several options to draw a THStack object.
See: http://root.cern.ch/root/htmldoc/THStack.html#THStack:Paint
In your case, you should use the option "nostack"
Rene Brun
Dongwook Jang wrote:
>
> Hi,
>
> I found THStack is very nice and useful. But it didn't preserve
> histogram shape at some point.
>
> When I tried like:
>
> TH1F* mc = (TH1F*) mcFile->Get("eTrack");
> TH1F* data = (TH1F*) dataFile->Get("eTrack");
> THStack* hs = new THStack("hs","variables 1");
> hs->Add(mc);
> hs->Add(data);
> hs->Draw();
>
> where mcFile and dataFile are root file containing 1D histograms.
>
> When I swap the adding order, the drawn plots are different. I
> understand the scales are different, but I think the shape at least
> should be preserved, right? Both histograms have same x-range and same bins.
>
> Is it a bug or am I missing something?
> Thank you.
>
> --
>
> Best regards,
> Dongwook Jang.
> phone : 630-840-2118 (office B0 170-I) 630-840-6315 (FAX)
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