void test(TString var="meff",TString plotname="v1j"){
  gErrorIgnoreLevel = kError;
 // gROOT->LoadMacro("/scratch/jvamen/Atlasstyle/AtlasStyle.C");
  //SetAtlasStyle();
  //gStyle->SetOptStat(000000);
  //gStyle->SetOptTitle(0);
  //gStyle->SetHatchesLineWidth(2);

  
  //TString var="meff";
  
  TFile* f=new TFile("./single_"+plotname+".root");
  
  
  TH1F* toys=(TH1F*)f->Get("toys");
  TH1F* signal=(TH1F*)f->Get("Signal");

  TVectorF * pmin=(TVectorF*)f->Get("pmin");
  bool data=true;
	int number= pmin(0);
  float pval = pmin(1);
  if(pval<0)
  data=false;	
  TCanvas c("c","c");
  c.SetLogy();
  
  
  toys->SetFillColorAlpha(kBlue,0.35);
	toys->GetYaxis()->SetTitle("pseudo-experiments");
  toys->GetXaxis()->SetTitle("-log_{10}(p-value)");
  toys->Draw();
	signal->SetFillColorAlpha(kRed, 0.35);
	signal->GetYaxis()->SetTitle("pseudo-experiments");
  signal->GetXaxis()->SetTitle("-log_{10}(p-value)");
  signal->Draw("same");
 
	double heigth=toys->GetMaximum();

	std::cout<<"hootgte: "<<1.2*heigth<<std::endl;
  if(data){
	TArrow ar_1class(pval,0.,pval,0.5*heigth, 1, "<");

	ar_1class.SetLineWidth(3);
	ar_1class.SetLineColor(kBlack);
	ar_1class.SetFillColor(kBlack);
	ar_1class.Draw("same");
  }
  
  
	TLegend *legend = new TLegend(0.68, 0.95, 0.8, 0.8);
  legend->SetBorderSize(0);
  legend->SetTextFont(42);
  legend->SetTextSize(0.027);
  legend->SetFillColor(0);
  legend->SetFillStyle(0);
  legend->SetLineColor(0);
 //legend->SetHeader("#splitline{pseudo-experiments SM-only}{ including sys. correlations}");
 TString plotname_script=plotname;
plotname_script.ReplaceAll("g","#gamma");
plotname_script.ReplaceAll("v","#nu");
 legend->SetHeader("Channel:"+plotname_script+" ");
  legend->AddEntry(toys, "pseudo-experiments", "lpf");
  legend->AddEntry(signal,"Signal gtt(800)","lpf");
   TLegend *legend2 = new TLegend(0.68, 0.8, 0.8, 0.7);
  legend2->SetBorderSize(0);
  legend2->SetTextFont(42);
  legend2->SetTextSize(0.03);
  legend2->SetFillColor(0);
  legend2->SetFillStyle(0);
  legend2->SetLineColor(0);
  legend2->SetHeader("#splitline{the black line indicates the p_{min}}{observed in data}");
  legend2->Draw("same");


  legend->Draw("same");
  
  
  double lumiData = 20281.4;                                                                                   

	
  TLatex n;
  n.SetNDC();
  n.SetTextColor(kBlack);
  n.SetTextFont(72);
  n.SetTextSize(0.04);
  if(var=="meff") n.DrawLatex(0.75,0.2,"Variable: m_{eff}");
  if(var=="met") n.DrawLatex(0.75,0.87,"Variable: E_{T}^{miss}");
  if(var=="minv") n.DrawLatex(0.75,0.87,"Variable: m_{inv}");
  n.SetTextFont(72);
  n.SetTextSize(0.04);
  n.DrawLatex(0.40,0.86,"ATLAS");
  n.SetTextFont(42);
  n.DrawLatex(0.50,0.86,"Preliminary");

  n.SetNDC();
  n.SetTextFont(42);
  n.SetTextColor(kBlack);
  mytext = n.DrawLatex(0.4, 0.8, Form("#intL dt = %.1f fb^{-1}, #sqrt{s} = 8 TeV", lumiData/1000. ));
  mytext->SetTextSize(0.03);
  
  		TString outdir="./";
		c.Print(outdir+plotname+".eps");
		c.Print(outdir+plotname+".pdf");
		c.Print(outdir+plotname+".png");
		c.Print(outdir+plotname+".C");
		c.Print(outdir+plotname+".root");

exit();

}