Re: [ROOT] TArrow question

From: lijowski@cosray2.wustl.edu
Date: Tue Jun 27 2000 - 21:56:49 MEST


   Marco,

  Thank you for your example. But in my plot the x axis has a log scale
  and I want to draw an arrow along y axis which has a linear scale.
  
   Michal Lijowski

> From mvl@nikhef.nl Tue Jun 27 19:35:05 2000
> Delivered-To: lijowski@cosray2.wustl.edu
> Date: Tue, 27 Jun 2000 21:08:19 +0200 (MET DST)
> From: Marco van Leeuwen <mvl@nikhef.nl>
> To: lijowski@cosray2.wustl.edu
> Cc: roottalk@pcroot.cern.ch
> Subject: Re: [ROOT] TArrow question 
> MIME-Version: 1.0
> 
> You can use a TArrow. This will accept pad-coordinates (i.e. in the same
> scale as the coordinates in your Histogram/Graph/Axis). However, the
> log-scale will be scaled in decades.
> 
> Marco van Leeuwen
> 
> {{
>    gROOT->Reset();
>    TCanvas *c1=new TCanvas("c1","Canvas #1",500,500);
>    gPad->SetLogy();
>    gPad->DrawFrame(0,1,1,1000);
>    TArrow *arrow=new TArrow(0.3,2,0.3,1.5);
>    arrow->Draw();
> }}
> 
> On 27 Jun 2000 lijowski@cosray2.wustl.edu wrote:
> 
> > 
> >   Hello,
> > 
> >   Is any way to draw an arrow on linear-log plot? I would like
> >   to use arrow to indicate the upper limit. Should I use TGraph 
> >   to draw it?
> > 
> >    Thank you and regards
> > 
> >    Michal Lijowski
> > 
> 
> 



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