{
   gROOT->SetStyle("Plain");
   TCanvas tc("c1","c1",0,0,600,500);

   TFile *tf=TFile::Open("misspolar.root");
   h11->SetLineWidth(2);
   h11->SetLineColor(4);
   gStyle->SetOptStat(0);
   gStyle->SetOptTitle(0);
   h11->GetXaxis()->SetTitle("beam-collimator misalignment (mm)");
   h11->GetYaxis()->SetTitle("average linear polarization in peak");
   h11->GetYaxis()->SetTitleOffset(1.6);
   h11->Draw("c");
}