// @(#)root/hist:$Id$ // Author: Frank Filthaut, Rene Brun 30/05/2007 /************************************************************************* * Copyright (C) 1995-2007, Rene Brun and Fons Rademakers. * * All rights reserved. * * * * For the licensing terms see $ROOTSYS/LICENSE. * * For the list of contributors see $ROOTSYS/README/CREDITS. * *************************************************************************/ #ifndef ROOT_TBinomialEfficiencyFitter #define ROOT_TBinomialEfficiencyFitter ////////////////////////////////////////////////////////////////////////// // // // TBinomialEfficiencyFitter // // // // Binomial Fitter for the division of two histograms. // // Use when you need to calculate a selection's efficiency from two // // histograms, one containing all entries, and one containing the subset// // of these entries that pass the selection // // // ////////////////////////////////////////////////////////////////////////// #include "TObject.h" class TH1; class TF1; class TVirtualFitter; class TBinomialEfficiencyFitter: public TObject { protected: TH1 *fDenominator; //Denominator histogram TH1 *fNumerator; //Numerator histogram TF1 *fFunction; //Function to fit Double_t fEpsilon; //Precision required for function integration (option "I") Bool_t fFitDone; //Set to kTRUE when the fit has been done Bool_t fAverage; //True if the fit function must be averaged over the bin Bool_t fRange; //True if the fit range must be taken from the function range static TVirtualFitter *fgFitter; //pointer to the real fitter public: TBinomialEfficiencyFitter(); TBinomialEfficiencyFitter(const TH1 *numerator, const TH1 *denominator); virtual ~TBinomialEfficiencyFitter(); void Set(const TH1 *numerator, const TH1 *denominator); void SetPrecision(Double_t epsilon); Int_t Fit(TF1 *f1, Option_t* option = ""); static TVirtualFitter* GetFitter(); void ComputeFCN(Int_t& npar, Double_t* /* gin */, Double_t& f, Double_t* par, Int_t flag); ClassDef(TBinomialEfficiencyFitter, 1) //Binomial Fitter for the division of two histograms }; void BinomialEfficiencyFitterFCN(Int_t& npar, Double_t* gin, Double_t& f, Double_t* par, Int_t flag); #endif