In the CVS version, I have optimized the computation of the Y range in case
of log scales. Your example runs nicely with the CVS head.
I also made a similar optimisation in TMultiGraph.
Rene Brun
Matthew D Wood wrote:
>
> Hi. I am trying to draw multiple histograms on the same canvas using the
> THStack class. I notice that when I try to look at histograms on a log
> scale the limits of the axis don't get set properly. Below I include the
> example code. In this example the lower limit gets set to 100 so the
> contents of the second histogram are not visible.
> I am using the root version 4.00/04 with gcc 2.96 and RH
> 7.1. Thanks for your help.
>
> Matthew Wood
>
> {
>
> TCanvas *c1 = new TCanvas();
> gPad->SetLogy();
>
> TH1F *hist1 = new TH1F("hist1","hist1",100,0,10);
> TH1F *hist2 = new TH1F("hist2","hist2",100,0,10);
>
> hist1->Fill(1,1E5);
> hist2->Fill(2,1);
>
> THStack *hs = new THStack();
>
> hs->Add(hist1);
> hs->Add(hist2);
>
> hs->Draw("nostack");
>
> }
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