/// \file
/// \ingroup tutorial_graphs
/// \notebook
/// Draw a simple graph.
///
/// \macro_image
/// \macro_code
///
/// \author Rene Brun

void graph() {

   TCanvas *c1 = new TCanvas("c1","A Simple Graph Example",200,10,700,500);

   c1->SetGrid();
 
   const Int_t n = 6;
   Double_t x[n]= {3,4,5,8,10,13};
   Double_t y[n]= {0.0628,0.061452,0.056987,0.062014,0.061208,0.061317};
 
   TGraph *gr = new TGraph(n,x,y);
   gr->SetLineColor(2);
   gr->SetLineWidth(2);
   gr->SetMarkerColor(4);
   gr->SetMarkerStyle(21);
   gr->SetTitle("#sigma(e^{+}e^{-}#rightarrowZHH) vs tan#beta");
   gr->GetXaxis()->SetTitle("t_{#beta}");
   gr->GetYaxis()->SetTitle("#sigma(fb)");
   gr->Draw("ACP");

   // TCanvas::Update() draws the frame, after which one can change it
   c1->Update();
   c1->GetFrame()->SetBorderSize(12);
   c1->Modified();

}