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Initiall commit

#include <iostream>
#include <iomanip>
#include <fstream>
#include <vector>
#include <map>
#include <string>
#include <cmath>
#include <stdio.h>

int eff_e3jets() {
  
const int dim = 6;
 double MH[dim], deltaMH[dim];
 double effWW[dim], effWH[dim], effHH[dim];
 double deltaeffWW[dim], deltaeffWH[dim], deltaeffHH[dim];

 //
 // MH values
 //
 MH[0] = 3.0;
 MH[1] = 3.5;
 MH[2] = 4.0;
 MH[3] = 4.5;
 MH[4] = 5.0;

 deltaMH[0] = 0.0;
 deltaMH[1] = 0.0;
 deltaMH[2] = 0.0;
 deltaMH[3] = 0.0;
 deltaMH[4] = 0.0;

 //
 //  effWW values
 //
 effWW[0] = 0.1507;
 effWW[1] = 0.1559;
 effWW[2] = 0.1468;
 effWW[3] = 0.1511;
 effWW[4] = 0.1552;

 //

//------------------

    TCanvas *c1 = new TCanvas("c1","1",1000,800);
    c1->Clear();
    //c1->SetLogy();  
    c1->SetGridy();  

    // Draw a frame
    TH1F *frame = c1->DrawFrame(0.0,5e-2,6.0,0.2);
  
    frame->GetXaxis()->SetTitle("metl cut");
    frame->GetXaxis()->SetTitleSize(.040);    
    frame->GetXaxis()->SetLabelSize(.05);    
    frame->GetXaxis()->SetTitleColor(1);
    frame->GetXaxis()->SetTitleOffset(1.2);
    frame->GetXaxis()->SetNdivisions(508,true);
  
    frame->GetYaxis()->SetTitle("RMS");
    frame->GetYaxis()->SetTitleSize(.040);
    frame->GetYaxis()->SetLabelSize(.05);  
    frame->GetYaxis()->SetTitleColor(1);
    frame->GetYaxis()->SetTitleOffset(1.4);
    // Draw the frame
    frame->SetTitle("metl x RMS");
    frame->Draw();
  
    TGraphErrors *grcc0 = new TGraphErrors(dim, MH, effWW, deltaMH, deltaeffWW);
    grcc0-> SetMarkerColor(kRed);
    grcc0-> SetMarkerStyle(20);
    grcc0-> SetMarkerSize(1.2);
    grcc0-> SetLineWidth(2);
    grcc0-> Draw("p");


    // Legend: 
    //  TLegend *leg = new TLegend(x1,y1,x2,y2,NULL,"brNDC");
    TLegend *leg = new TLegend(0.72,0.75,0.90,0.90,NULL,"brNDC");
    leg->SetTextSize(0.05);
    leg->SetFillStyle(0);
    leg->SetFillColor(0);
    leg->SetFillStyle(1001);
    //  leg->SetBorderSize(0); 

//    entry=leg->AddEntry(grcc0,"WW","p");
//    entry->SetTextFont(22);
//    leg->Draw();

    c1->Modified();
    c1->Print("METsig-RMS.eps");
    c1->Print("METsig-RMS.gif");
  
  return 0;
}