//-----------------------------------------------------------------------------------------------
//DIVIDE VARIOUS HISTOGRAMS FOR EFFICIENCY PLOTS
//-----------------------------------------------------------------------------------------------
#include <iostream.h>
void xft_effCalc (TH1F* numHist, TH1F* denomHist, TH1F* effHist) 
{

// Loop over the Pt Fnd and Gen plots to determine efficiency
   for(Int_t i=0; i<=(denomHist->GetNbinsX()+1); i++) 
   {
  		float effFnd=0.0;
		float efferr=0.0;
   	float gennum = denomHist->GetBinContent(i);
		float numobs = numHist->GetBinContent(i);


		if(gennum>0.5) {
	   	effFnd = numobs/gennum;
	    	efferr = sqrt(effFnd*(1.0-effFnd)/gennum);
		}
		
		effHist->SetBinContent(i,effFnd);
		effHist->SetBinError(i,efferr);
   }
   return;
}