Hi Henrique,
Unfortunately, it was too late to put this fix in the 3.02 release.
I have added a fix in TPad::DrawFrame and TGraph::PaintGraph to automatically
suppress this line. (now in CVS)
Meanwhile, you can circumvent the problem by drawing a frame via an empty
TH1F histogram paint with option "a". Example
TH1F *frame = new TH1F("frame","",2,xmin,xmax);
frame->SetMinimum(ymin);
frame->setmaximum(ymax);
frame->Draw("a");
Rene Brun
Henrique de M. J. Barbosa - mestrado wrote:
>
> Dear Rooters,
>
> I would like to ask a simple question I couldn't find the answer to in the
> manual. How do I draw a simple TGraph without getting that annoying line
> parallel to the x axis marking the y=0 position?
>
> I've tried with and without grid lines and the y=0 line is always there.
> Is there a simple way to draw a graph without it?
>
> I have taken a look at the tutorials pages but all examples with graphs
> have only y>0 values but in my case I have positive and negative values.
> So the y=0 line is not the x axis.
>
> I am sending attached a picture of a graph where the problem shows up.
>
> thanks,
>
> Henrique
> ****************************************
> State University at Campinas - BRASIL
> "Gleb Wathagin" Physics Institute
> Department of Cosmic Rays and Chronology
>
> Henrique Barbosa The Pierre Auger
> PhD Student Observatory
> ****************************************
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