{ 

	//pt rebinning array
	Float_t ptcalcbinning1[4] =  {0.5 ,1 ,2 ,5};
	Float_t ptcalcbinning2[4] = {14,40,100,200};
	Float_t ptcalcbinning3[5] = {1,15,28,43,53};
	Double_t ptbinning[52];
	ptbinning[0] = 0;
	for ( int j = 0; j < 4 ; j ++ ){
		for ( int i = ptcalcbinning3[j]; i<ptcalcbinning3[j+1]; i++){ 
		ptbinning[i] = ptbinning[i-1] +	 ptcalcbinning1[j];
		}
	}
	
	TH2F *Resolution_E_dPt_Ptrebin = new TH2F("Resolution_E_dPt_Ptrebin", "Electron Resolution dPt vs Pt ", 51, ptbinning , 200, -5., 5.) ;		

		TCanvas * c1_2 = new TCanvas("c1_2","",10,10,500,500);  // gives the page size		
		c1_2->cd();
		Resolution_E_dPt_Ptrebin->Draw();								
		c1_2->Update();	

}