How to change range of TGraph

ROOT
1

Dear Rooters
At the time of drawing a graph, I want to set the range in both X-axis and Y-axis in my macro through command.
It is possible by clicking on the canvas and getting TAxis and then SetRange option.
But I want to set the range in my programme.
Please Give me suggestion.

With regards.
Tapasi

2 
{
   Int_t n=20;
   Double_t x[n],y[n];
   for (Int_t i=0; i < n; i++) {
      x[i]=i*0.1;
      y[i]=10*sin(x[i]+0.2);
   }
   TGraph *gr1 = new TGraph (n,x,y);
   TAxis *axis = gr1->GetXaxis();

   axis->SetLimits(0.,5.);                 // along X
   gr1->GetHistogram()->SetMaximum(20.);   // along          
   gr1->GetHistogram()->SetMinimum(-20.);  //   Y     

   gr1->Draw("AC*");
}
2 Likes
3

Meanwhile I was able to do it.
Just one last unrelated thing:
Any idea on how to add an extra pad to an already divided canvas? Imagine I have two columns and want a third one. Iā€™m doing this by clearing the canvas and re-dividing it, but I feel like there should be a more elegant way of doing it.

Thanks!

4

You can create as many pad placed where you want using TPad, but
the already existing pads will not move automatically to make room for the extra pad(s)