Hi Jeff,
What you do should work
g->Draw("ap");
g->SetMinimum(0);
if not, please send me a short but running script showing the problem.
Rene Brun
On Fri, 6 Dec 2002, Jeff Hartnell wrote:
> Hi,
> It seems to be impossible to override the automatic axis scaling in
> TGraph when you draw it with the "a" option.
>
> I found this in the digest:
>
> From: Rene Brun (Rene.Brun@cern.ch)
> Date: Wed Mar 20 2002 - 10:33:17 MET
>
> a.. Next message: Rene Brun: "Re: [ROOT] TGaxis"
> b.. Previous message: Rene Brun: "Re: [ROOT] TGeant3, TGeant4 from
> AliSoft"
> c.. In reply to: Steffen Grohmann: "[ROOT] SetRangeUser Problem on
> Y-axis"
> d.. Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
>
> ------------------------------------------------------------------------
> --------
>
>
> Hi Steffen,
>
> When you use the option "a" in TAxis::Draw, the axis limits are
> automatically recomputed from the range of the actual Y values.
> You can force a max/min of the y axis via TAxis::SetMaximum/SetMinimum.
> An alternative solution is to use TPad::DrawFrame.
>
> Rene Brun
>
> but TAxis doesn't have SetMaximum or minimum does it?
>
> I do this:
>
> gAdcPhNear[l]->Draw("AP");
> gAdcPhNear[l]->SetMinimum(0);
>
> but it still gets drawn with the minimum above zero. Why doesn't this
> work? Can it be made to work?
>
> Has anyone found a solution to this problem? I could always draw a
> histogram first with the appropriate scale, but that's ugly!
> Thanks,
> Jeff.
>
> p.s. using latest root on redhat 7.3.1
>
>
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