Re: plotting two TGraphs

From: Rene Brun (Rene.Brun@cern.ch)
Date: Wed Feb 11 1998 - 15:08:36 MET


Wouter Hulsbergen wrote:
> 
> Dear Root editors,
> I have two data sets which I would like to plot together. Is it possible
> to draw two TGraphs in the same plot ?
> Regards, Wouter

Here is a macro illustrating how to draw two graphs in the same pad.

Rene Brun

{
   gROOT->Reset();
   c1 = new TCanvas("c1");
   c1->SetGrid();
   c1->DrawFrame(0,0,2000,70);

   Float_t x[] = {400,700,900,1100,1800};
   Float_t y[] = {12,7,10,20,60};
   Float_t u[] = {300,700,900,1100,1900};
   Float_t v[] = {2,4,20,40,60};

   gr1 = new TGraph(5,x,y);
   gr1->SetMarkerStyle(21);
   gr1->Draw("lp");

   gr2 = new TGraph(5,u,v);
   gr2->SetMarkerStyle(22);
   gr2->Draw("lp");
}



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