class ROOT::Fit::Chi2FCN<ROOT::Math::IBaseFunctionMultiDim>: public ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>


   Chi2FCN class for binnned fits using the least square methods

   @ingroup  FitMethodFunc

This class is also known as (typedefs to this class)

ROOT::Fit::Chi2Function, ROOT::Fit::Chi2FCN<ROOT::Math::IMultiGenFunction>

Function Members (Methods)

public:

virtual	~Chi2FCN<ROOT::Math::IBaseFunctionMultiDim>()
ROOT::Fit::Chi2FCN<ROOT::Math::IBaseFunctionMultiDim>	Chi2FCN<ROOT::Math::IBaseFunctionMultiDim>(const ROOT::Fit::Chi2FCN<ROOT::Math::IBaseFunctionMultiDim>&)
ROOT::Fit::Chi2FCN<ROOT::Math::IBaseFunctionMultiDim>	Chi2FCN<ROOT::Math::IBaseFunctionMultiDim>(const ROOT::Fit::BinData& data, ROOT::Fit::Chi2FCN<ROOT::Math::IBaseFunctionMultiDim>::IModelFunction& func)
virtual ROOT::Fit::Chi2FCN<ROOT::Math::IBaseFunctionMultiDim>::BaseFunction*	Clone() const
virtual const ROOT::Fit::BinData&	Data() const
virtual double	DataElement(const double* x, unsigned int i, double* g) const
virtual void	Gradient(const double* x, double* g) const
virtual const ROOT::Fit::Chi2FCN<ROOT::Math::IBaseFunctionMultiDim>::IModelFunction&	ModelFunction() const
virtual unsigned int	ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>::NCalls() const
virtual unsigned int	ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>::NDim() const
virtual unsigned int	NFitPoints() const
virtual unsigned int	ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>::NPoints() const
double	ROOT::Math::IBaseFunctionMultiDim::operator()(const double* x) const
ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>&	ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>::operator=(const ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>&)
virtual void	ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>::ResetNCalls()
virtual ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>::Type_t	Type() const
virtual void	ROOT::Math::BasicFitMethodFunction<ROOT::Math::IBaseFunctionMultiDim>::UpdateNCalls() const

protected:

virtual void

SetNFitPoints(unsigned int n) const

private:

virtual double	DoDerivative(const double* x, unsigned int icoord) const
virtual double	DoEval(const double* x) const

Data Members

public:

enum ROOT::Math::BasicFitMethodFunction::Type_t {	kUndefined
	kLeastSquare
	kLogLikelihood
};

private:

const ROOT::Fit::BinData&	fData
ROOT::Fit::Chi2FCN<ROOT::Math::IBaseFunctionMultiDim>::IModelFunction&	fFunc
vector<double>	fGrad	for derivatives
unsigned int	fNEffPoints	number of effective points used in the fit

Class Charts

Function documentation

unsigned int NFitPoints() const

 effective points used in the fit (exclude the rejected one)

{ return fNEffPoints; }

void SetNFitPoints(unsigned int n) const

 set number of fit points (need to be called in const methods, make it const)

{ fNEffPoints = n; }