APReweight.h

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/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/


 
#ifndef APReweight_h
#define APReweight_h
 
#include "APReweightBase.h"
#include <string>
#include <vector>
 
class TTree;
class TH1;
class TH1D;
class TAxis;
class APWeightEntry;
 
class APReweight : public APReweightBase {
 
public:
  APReweight();                                                                  
  APReweight(TTree* denominator, const std::string& denominator_branch, TTree* numerator, const std::string& numerator_branch, unsigned int n_bins, double x_min, double x_max, bool isTrig = false); 
  APReweight(std::vector< double > denominator, std::vector< double > numerator, unsigned int n_bins, double x_min, double x_max, bool isTrig = false); 
  APReweight(TH1* denominator_in, TH1* numerator_in, bool isTrig = false);       
  virtual ~APReweight();                          
 
  void ReadEfficiency(TH1* efficiency_in, TH1* err_low_in, TH1* err_high_in = 0);
  
  APWeightEntry* GetBinWeight(unsigned int bin) const;                           
  APWeightEntry* GetWeight(double value) const;                                  
   
  double GetSampleScale() const;                                                 
  unsigned int NBins() const;                                                    
  unsigned int GetBin(double value) const;                                       
  
  const TH1D* GetDenominatorHist() const;                                              
  const TH1D* GetNumeratorHist() const;                                                
  
  void SetSystUncert(double rel_uncert);                                         
  void SetQuietMode(bool isQuiet = true);                                        
 
  ClassDef(APReweight, 1)
 
private:
  TH1D* m_denominator_hist;                                                       
  TH1D* m_numerator_hist;                                                         
  std::vector< APWeightEntry* > m_weights;                                        
  unsigned int m_n_bins;                                                          
  TAxis *m_axis;                                                                  
};
 
#endif