{
   //
   // Example showing how to superimpose a TGraph with a different range
   // using a transparent pad.
   //
   gROOT->Reset();
   c1 = new TCanvas("c1","gerrors2",200,10,700,500);
   TPad *pad = new TPad("pad","",0,0,1,1);
   pad->SetFillColor(42);
   pad->SetGrid();
   pad->Draw();
   pad->cd();

      // draw a frame to define the range
   TH1F *hr = c1->DrawFrame(-0.4,0,1.2,12);
   hr->SetXTitle("X title");
   hr->SetYTitle("Y title");
   pad->GetFrame()->SetFillColor(21);
   pad->GetFrame()->SetBorderSize(12);

      // create first graph
   Int_t n1 = 10;
   Double_t x1[]  = {-0.22, 0.05, 0.25, 0.35, 0.5, 0.61,0.7,0.85,0.89,0.95};
   Double_t y1[]  = {1,2.9,5.6,7.4,9,9.6,8.7,6.3,4.5,1};
   Double_t ex1[] = {.05,.1,.07,.07,.04,.05,.06,.07,.08,.05};
   Double_t ey1[] = {.8,.7,.6,.5,.4,.4,.5,.6,.7,.8};
   gr1 = new TGraphErrors(n1,x1,y1,ex1,ey1);
   gr1->SetMarkerColor(kBlue);
   gr1->SetMarkerStyle(21);
   gr1->Draw("LP");

      // create second graph
   Int_t n2 = 10;
   Float_t x2[]  = {-0.28, 0.005, 0.19, 0.29, 0.45, 0.56,0.65,0.80,0.90,1.01};
   Float_t y2[]  = {0.82,3.86,7,9,10,10.55,9.64,7.26,5.42,2};
   Float_t ex2[] = {.04,.12,.08,.06,.05,.04,.07,.06,.08,.04};
   Float_t ey2[] = {.6,.8,.7,.4,.3,.3,.4,.5,.6,.7};
   for (Int_t i=0;i<n2;i++) {
      y2[i] *= 100;
      ey2[i] *= 100;
   }
   //create a transparent pad drawn on top of the main pad
   c1->cd();
   TPad *overlay = new TPad("overlay","",0,0,1,1);
   overlay->SetFillStyle(4000);
   overlay->SetFillColor(0);
   overlay->SetFrameFillStyle(4000);
   overlay->Draw();
   overlay->cd();
   gr2 = new TGraphErrors(n2,x2,y2,ex2,ey2);
   gr2->SetMarkerColor(kRed);
   gr2->SetMarkerStyle(20);
   gr2->SetName("gr2");
   Double_t xmin = pad->GetUxmin();
   Double_t ymin = 0;
   Double_t xmax = pad->GetUxmax();
   Double_t ymax = 1200;
   TH1F *hframe = overlay->DrawFrame(xmin,ymin,xmax,ymax);
   hframe->GetXaxis()->SetLabelOffset(99);
   hframe->GetXaxis()->SetLabelOffset(99);
   hframe->GetXaxis()->SetLabelOffset(99);
   hframe->GetYaxis()->SetLabelOffset(99);
   gr2->Draw("LP");
   
   
   //Draw an axis on the right side
   TGaxis *axis = new TGaxis(xmax,ymin,xmax, ymax,ymin,ymax,510,"+L");
   axis->SetLineColor(kRed);
   axis->SetLabelColor(kRed);
   axis->Draw();

  char out_filename[30];
  sprintf(out_filename,"test.eps");
  c1->Update();
  c1->Print(out_filename);
}