Lau1DHistPdf.hh

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// Copyright University of Warwick 2006 - 2013.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

// Authors:
// Thomas Latham
// John Back
// Paul Harrison

#ifndef LAU_1DHIST_PDF
#define LAU_1DHIST_PDF

#include "LauAbsPdf.hh"

class TH1;

class Lau1DHistPdf : public LauAbsPdf {

        public:

                Lau1DHistPdf(const TString& theVarName, const TH1* hist, Double_t minAbscissa, Double_t maxAbscissa,
                                Bool_t useInterpolation = kTRUE, Bool_t fluctuateBins = kFALSE);

                virtual ~Lau1DHistPdf();

                Lau1DHistPdf(const Lau1DHistPdf& other);


                virtual void calcLikelihoodInfo(const LauAbscissas& abscissas);

                using LauAbsPdf::calcLikelihoodInfo;

                virtual void calcNorm();


                virtual void calcPDFHeight( const LauKinematics* kinematics );

        protected:
                void doBinFluctuation();

                void checkNormalisation();


                Double_t getBinHistValue(Int_t bin) const;


                Double_t interpolate(Double_t x) const;


                Double_t interpolateNorm(Double_t x) const;

        private:
                TH1* hist_;

                Bool_t useInterpolation_;
                Bool_t fluctuateBins_;

                Int_t nBins_;
                Double_t axisMin_;
                Double_t axisMax_;
                Double_t axisRange_;

                ClassDef(Lau1DHistPdf,0) // 1D histogram pdf class
};

#endif