{
 Int_t i;
   const Int_t n = 5;

  
    Double_t x[n] = {5,6,7,8,9};
    Double_t y[n] = {53,126,111,151,92};
  
    Double_t ex[n] = {0,0,0,0,0};
    Double_t ey[n] = {3,4,3,2,2};
   gr = new TGraphErrors(n,x,y,ex,ey);
   gr->Draw("A*");


}