#include<iostream>
#include<fstream>
#include<TMath.h>
#include<TFile.h>
#include<TH2D.h>
#include<TH1D.h>

using namespace std;


void ReBinContent(){

TFile *fMix = TFile::Open("fRootFileMix.root");

TH2D *hist2D = (TH2D*) fMix->Get("fHistPionPNV0MMix_proj_1_2");

hist2D->Draw("surf1");

TH1D *histProjectionY = hist2D->ProjectionY("histProjectionY",hist2D->GetXaxis()->FindBin(-1.6-.00001),hist2D->GetXaxis()->FindBin(1.6+.00001));
histProjectionY->Scale(hist2D->GetXaxis()->GetBinWidth(1));


cout << "BinContent at Delta phi ~0 : " << histProjectionY->GetBinContent(histProjectionY->FindBin(0-0.0001)) << " " << "BinContent at Delta phi ~pi : " << histProjectionY->GetBinContent(histProjectionY->FindBin(TMath::Pi()+0.0001))<<endl;  

// Making every bincontent of histogram histProjectionY with bincontent of bin at 0 or pi 

TH1D *histProjectionYClone = (TH1D*)histProjectionY->Clone();
histProjectionYClone->SetName("histProjectionYClone");

Int_t bin = histProjectionY->GetNbinsX();

for(int iBin=1;iBin<bin+1;iBin++)
histProjectionYClone->SetBinContent(iBin,histProjectionYClone->GetBinContent(histProjectionYClone->FindBin(0-0.0001)));

histProjectionY->SetMarkerColor(1);
histProjectionY->SetMarkerStyle(20);
histProjectionYClone->SetMarkerColor(2);
histProjectionY->SetMarkerStyle(25);


TCanvas *c =new TCanvas("c","",900,800);
histProjectionY->Draw();
histProjectionYClone->Draw("same");


}