Re: [ROOT] TGraphErrors ?

From: Rene Brun (Rene.Brun@cern.ch)
Date: Wed May 30 2001 - 08:18:11 MEST


See an example in $ROOTSYS/tutorials/graph.C. In particular look at the
comments:

   //Add axis titles.
   //A graph is drawn using the services of the TH1F histogram class.
   //The histogram is created by TGraph::Paint.
   //TGraph::Paint is called by TCanvas::Update. This function is called
by default
   //when typing <CR> at the keyboard. In a macro, one must force
TCanvas::Update.

   c1->Update();
   c1->GetFrame()->SetFillColor(21);
   c1->GetFrame()->SetBorderSize(12);
   gr->GetHistogram()->SetXTitle("X title");
   gr->GetHistogram()->SetYTitle("Y title");
   c1->Modified();

Rene Brun


On Tue, 29 May 2001, Chia Ming,Kuo wrote:

> Dear all,
> 
> I use root 2.25/02.
> I can use histo1->GetXaxis()->SetTitle("X-Axis") in histogram.
> But when I employ this to TGraphErrors (gr->GetXaxis()->SetTitle("X-Axis")),
> I fail. There is a segmentation error message.
> Why couldn't I use it in TGraphErrors ?
> 
> Thanks for your help !
> 
> Sincerely,
> Chia Ming
> 



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