#ifndef HISTPDF
#define HISTPDF

#include "RooAbsPdf.h"
#include "RooRealProxy.h"
#include "RooCategoryProxy.h"
#include "RooAbsReal.h"
#include "RooRealVar.h"
#include "RooAbsCategory.h"
#include "RooDataHist.h"
#include "RooHistPdf.h"
#include "TH1F.h"
#include "TFile.h"
#include <string>
#include <iostream>
#include "utils.h"

using namespace std;

TFile *ifile;
TH1F *h3;         //IF YOU ARE READING THIS CAN YOU TELL ME WHY THIS CODE DOES NOT WORK IF THESE POINTERS ARE MADE DATA MEMBERS?
                  //campoverdeangelf@gmail.com

class HistPDF : public RooAbsPdf
{
  public:

  HistPDF() {} ;
  HistPDF(const char *name, const char *title, RooAbsReal& _x, RooAbsReal& _z);
  HistPDF(const HistPDF& other, const char* name=0);
  virtual TObject* clone(const char* newname) const { return new HistPDF(*this,newname); }
  inline virtual ~HistPDF() { }

protected:

  RooRealProxy x ;
  RooRealProxy z ;
  void Interpolate() const;
  Double_t evaluate() const;

private:
  ClassDef(HistPDF,1)
};
 
#endif