class ROOT::Math::LSResidualFunc: public ROOT::Math::IGradientFunctionMultiDim


    LSResidualFunc class description.
    Internal class used for accessing the residuals of the Least Square function
    and their derivates which are estimated numerically using GSL numerical derivation.
    The class contains a pointer to the fit method function and an index specifying
    the i-th residual and wraps it in a multi-dim gradient function interface
    ROOT::Math::IGradientFunctionMultiDim.
    The class is used by ROOT::Math::GSLNLSMinimizer (GSL non linear least square fitter)

    @ingroup MultiMin

Function Members (Methods)

public:

virtual	~LSResidualFunc()
virtual ROOT::Math::IMultiGenFunction*	Clone() const
double	ROOT::Math::IGradientMultiDim::Derivative(const double* x, unsigned int icoord = 0) const
virtual void	FdF(const double* x, double& f, double* g) const
virtual void	Gradient(const double* x, double* g) const
ROOT::Math::IBaseFunctionMultiDim	ROOT::Math::IBaseFunctionMultiDim::IBaseFunctionMultiDim()
ROOT::Math::IBaseFunctionMultiDim	ROOT::Math::IBaseFunctionMultiDim::IBaseFunctionMultiDim(const ROOT::Math::IBaseFunctionMultiDim&)
ROOT::Math::IGradientFunctionMultiDim	ROOT::Math::IGradientFunctionMultiDim::IGradientFunctionMultiDim()
ROOT::Math::IGradientFunctionMultiDim	ROOT::Math::IGradientFunctionMultiDim::IGradientFunctionMultiDim(const ROOT::Math::IGradientFunctionMultiDim&)
ROOT::Math::IGradientMultiDim	ROOT::Math::IGradientMultiDim::IGradientMultiDim()
ROOT::Math::IGradientMultiDim	ROOT::Math::IGradientMultiDim::IGradientMultiDim(const ROOT::Math::IGradientMultiDim&)
ROOT::Math::LSResidualFunc	LSResidualFunc()
ROOT::Math::LSResidualFunc	LSResidualFunc(const ROOT::Math::LSResidualFunc& rhs)
ROOT::Math::LSResidualFunc	LSResidualFunc(const ROOT::Math::FitMethodFunction& func, unsigned int i)
virtual unsigned int	NDim() const
double	ROOT::Math::IBaseFunctionMultiDim::operator()(const double* x) const
ROOT::Math::LSResidualFunc&	operator=(const ROOT::Math::LSResidualFunc& rhs)

private:

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

Data Members

private:

const ROOT::Math::FitMethodFunction*	fChi2
unsigned int	fIndex
vector<double>	fX2	cached vector

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

LSResidualFunc()

default ctor (required by CINT)

{}

LSResidualFunc(const ROOT::Math::FitMethodFunction& func, unsigned int i)

{}

LSResidualFunc(const ROOT::Math::LSResidualFunc& rhs)

 copy ctor

operator=(const ROOT::Math::LSResidualFunc& rhs)

IMultiGenFunction * Clone() const

unsigned int NDim() const

{ return fChi2->NDim(); }

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

FdF(x,f0,g)

double DoEval(const double* x) const

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

return  ROOT::Math::Derivator::Eval(*this, x, icoord, 1E-8);