How can I change the colour in the x direction only?

[souvik]

Dear All,
I want to change the colour in the x direction(error bars in x direction). Could you please suggest me what should I add to my following code ?
I want to put two different colours for two different error bars.

Thanks in Advance.
eff_gr_pi.C (659 Bytes)

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[couet]

{
   double x[]  = {0.085, 0.145, 0.195, 0.27};
   double y[]  = {1.11,1.21,1.08,1.00};
   double ex[] = {0.035, 0.025, 0.025, 0.05};
   double ey[] = {0.08,0.06,0.05,0.06};
   auto ge1    = new TGraphErrors(4, x, y, ex, 0);
   auto ge2    = new TGraphErrors(4, x, y, 0, ey);

   ge1->SetMarkerStyle(20);
   ge1->SetLineColor(kRed);
   ge1->Draw("ap");

   ge2->SetLineColor(kBlue);
   ge2->Draw("p");

   ge1->GetXaxis()->SetTitle("#pi_{slow} in momentum GeV/c");
   ge1->GetYaxis()->SetTitle("#epsilon(Data)/#epsilon(MC)");
}

[souvik]

Thanks. It did help.