TSFuncModel.h

/*
 * TSFunc1DModel.h
 *
 *  Created on: Aug 5, 2014
 *      Author: Silvestro di Luise
 *              Silvestro.Di.Luise@cern.ch
 *
 *
 *  Make an intermediate TSFuncModel: public TSFunc2D
 *  Set NDIM etc...
 *
 */

#ifndef TSFUNC1DMODEL_H_
#define TSFUNC1DMODEL_H_

#include <TString.h>
#include <TFormula.h>
#include <TF1.h>

#include "TSVariable.h"
#include "TSParameter.h"
#include "TSFunction1D.h"
#include "TSFunction2D.h"


#include "TSArgList.h"

/*
 *
 */

class TSFuncModel: public TSFunction2D {

public:

    TSFuncModel() {};
    TSFuncModel(TString name,TString title);
    TSFuncModel(TString name,TString title,const TSArgList& set);
    TSFuncModel(TString name,TString title,const TSArgList& set, const TSArgSet &coefs);
    TSFuncModel(TString name,TString title,TString formula,const TSArgList& set);
    TSFuncModel(TString name,TString title,TString formula,const TSArgList& set, const TSArgSet &coefs);


    virtual ~TSFuncModel();

    virtual double Eval(double x, double y=0) const =0;
    virtual double Eval() const =0;
    virtual double Evaluate() const =0;

    double GetNormalization() const {return fNormalization;}
    int GetNumOfFuncs() const {return fNFuncs;}
    int GetNumOfCoefs() const {return fNCoefs;}
    bool HasCoefs() const {return fHasCoefs;}

    void Init();

    bool IsLinear() const {return fIsLinear;}
    bool IsTFormula() const {return fIsTFormula;}

    TString GetFormula() const {return fExpr;}
    TString GetTF1Formula() const {return fTF1Formula;}

    void Print() const;

    void ResetNormalization() const;
    void SetNormalization(double integral,double binw_width_x=1,double bin_width_y=1) const;
    void NormalizeToIntegral(const TH1 &) const;
    void NormalizeToHistogram(const TH1 &) const;

protected:

    int fAddCoefficients(const TSArgSet &);
    int fAddFunctions(const TSArgSet &);

    int fAnalyseModelFormula(TString expr,const TSArgSet &funcs, const TSArgSet &coeff);

    const TSFunction1D *fFunc1D;
    const TSParameter *fParams;

    TString fExpr;
    TString fTF1Formula;

    TFormula fFormula;

    int fNFuncs;
    int fNCoefs;
    bool fHasCoefs;
    bool fIsTFormula;
    bool fIsLinear;


    static const int NMAX_FORMULA_VARS=30;

    int func2ParamIndex[NMAX_FORMULA_VARS];
    int coef2ParamIndex[NMAX_FORMULA_VARS];

    TSParameter *fCoefsList[NMAX_FORMULA_VARS];
    TSFunction1D *fFunctionsList[NMAX_FORMULA_VARS];

private:

    mutable double fNormalization;

};

#endif /* TSFUNC1DMODEL_H_ */