Plot graph using data file

General Chat
1

Hi,

I have a data in four columns (named as A:X:Y:Z) and I want to plot between A vs X and A vs X, Y and Z and Data is in a1.dat file.
Can anyone suggest me any example or code to plot this.

Thanks.
Regards,
SKJ

2 
{
  TTree *t = new TTree("t", "four columns");
  // assuming four columns separated by whitespaces
  t->ReadFile("a1.dat", "A/D:X:Y:Z");
  TCanvas *c = new TCanvas("c", "c");
  c->Divide(2, 2);
  c->cd(1);
  t->Draw("A:X");
  c->cd(2);
  t->Draw("A:Y");
  c->cd(3);
  t->Draw("A:Z");
  c->cd(4);
  t->Draw("Y:Z");
  c->cd(0);
}