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


   Chi2FCN class for binnned fits using the least square methods

   @ingroup  FitMethodFunc

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

ROOT::Fit::Chi2FCN<ROOT::Math::IMultiGradFunction>, ROOT::Fit::Chi2GradFunction

Function Members (Methods)

public:

virtual	~Chi2FCN<ROOT::Math::IGradientFunctionMultiDim>()
ROOT::Fit::Chi2FCN<ROOT::Math::IGradientFunctionMultiDim>	Chi2FCN<ROOT::Math::IGradientFunctionMultiDim>(const ROOT::Fit::Chi2FCN<ROOT::Math::IGradientFunctionMultiDim>&)
ROOT::Fit::Chi2FCN<ROOT::Math::IGradientFunctionMultiDim>	Chi2FCN<ROOT::Math::IGradientFunctionMultiDim>(const ROOT::Fit::BinData& data, const ROOT::Fit::Chi2FCN<ROOT::Math::IGradientFunctionMultiDim>::IModelFunction& func)
virtual ROOT::Fit::Chi2FCN<ROOT::Math::IGradientFunctionMultiDim>::BaseFunction*	Clone() const
virtual const ROOT::Fit::BinData&	Data() const
virtual double	DataElement(const double* x, unsigned int i, double* g) const
double	ROOT::Math::IGradientMultiDim::Derivative(const double* x, unsigned int icoord = 0) const
virtual void	ROOT::Math::IGradientFunctionMultiDim::FdF(const double* x, double& f, double* df) const
virtual void	Gradient(const double* x, double* g) const
virtual const ROOT::Fit::Chi2FCN<ROOT::Math::IGradientFunctionMultiDim>::IModelFunction&	ModelFunction() const
virtual unsigned int	ROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::NCalls() const
virtual unsigned int	ROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::NDim() const
virtual unsigned int	NFitPoints() const
virtual unsigned int	ROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::NPoints() const
double	ROOT::Math::IBaseFunctionMultiDim::operator()(const double* x) const
ROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>&	ROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::operator=(const ROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>&)
virtual void	ROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::ResetNCalls()
virtual ROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::Type_t	Type() const
virtual void	ROOT::Math::BasicFitMethodFunction<ROOT::Math::IGradientFunctionMultiDim>::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
const ROOT::Fit::Chi2FCN<ROOT::Math::IGradientFunctionMultiDim>::IModelFunction&	fFunc
vector<double>	fGrad	for derivatives
unsigned int	fNEffPoints	number of effective points used in the fit

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

BaseFunction * Clone() const

 clone the function

unsigned int NFitPoints() const

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

{ return fNEffPoints; }

double DataElement(const double* x, unsigned int i, double* g) const

 i-th chi-square residual

void Gradient(const double* x, double* g) const

 need to be virtual to be instantited

void SetNFitPoints(unsigned int n) const

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

{ fNEffPoints = n; }

double DoEval(const double* x) const

      Evaluation of the  function (required by interface)

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

 for derivatives