MultiNumGradFunction class to wrap a normal function in a gradient function using numerical gradient calculation provided by the class Derivator (based on GSL numerical derivation)

Definition at line 53 of file MultiNumGradFunction.h.

Public Member Functions
	MultiNumGradFunction (const IMultiGenFunction &f)
	Constructor from a IMultiGenFunction interface. More...

template<class FuncType >
	MultiNumGradFunction (FuncType f, int n)
	Constructor from a generic function (pointer or reference) and number of dimension implementiong operator () (double * x) More...

	~MultiNumGradFunction ()
	Destructor (no operations) More...

unsigned int	NDim () const
	Retrieve the dimension of the function. More...

unsigned int	NCalls () const

IMultiGenFunction *	Clone () const
	Clone a function. More...

void	SetOwnership (bool on=true)

Public Member Functions inherited from ROOT::Math::IGradientFunctionMultiDim
virtual	~IGradientFunctionMultiDim ()
	Virtual Destructor (no operations) More...

virtual void	Gradient (const double x, double grad) const
	Evaluate all the vector of function derivatives (gradient) at a point x. More...

virtual void	FdF (const double x, double &f, double df) const
	Optimized method to evaluate at the same time the function value and derivative at a point x. More...

Public Member Functions inherited from ROOT::Math::IBaseFunctionMultiDim
	IBaseFunctionMultiDim ()

virtual	~IBaseFunctionMultiDim ()
	virtual destructor More...

double	operator() (const double *x) const
	Evaluate the function at a point x[]. More...

Public Member Functions inherited from ROOT::Math::IGradientMultiDim
virtual	~IGradientMultiDim ()
	virual destructor More...

double	Derivative (const double *x, unsigned int icoord=0) const
	Return the partial derivative with respect to the passed coordinate. More...

Static Public Member Functions
static void	SetDerivPrecision (double eps)
	precision value used for calculating the derivative step-size h = eps * \|x\|. More...

static double	GetDerivPrecision ()
	get precision value used for calculating the derivative step-size More...

Private Member Functions
double	DoEval (const double *x) const
	Implementation of the evaluation function. More...

double	DoDerivative (const double *x, unsigned int icoord) const
	function to evaluate the derivative with respect each coordinate. More...

Private Attributes
const IMultiGenFunction *	fFunc

unsigned int	fDim

unsigned int	fNCalls

bool	fOwner

Static Private Attributes
static double	fgEps = 0.001

Additional Inherited Members
Public Types inherited from ROOT::Math::IGradientFunctionMultiDim
typedef IBaseFunctionMultiDim	BaseFunc

typedef IGradientMultiDim	BaseGrad

Public Types inherited from ROOT::Math::IBaseFunctionMultiDim
typedef IBaseFunctionMultiDim	BaseFunc

#include <Math/MultiNumGradFunction.h>

Inheritance diagram for ROOT::Math::MultiNumGradFunction:

Collaboration diagram for ROOT::Math::MultiNumGradFunction:

Constructor & Destructor Documentation

ROOT::Math::MultiNumGradFunction::MultiNumGradFunction ( const IMultiGenFunction & f )

inline

Constructor from a IMultiGenFunction interface.

Definition at line 61 of file MultiNumGradFunction.h.

Referenced by Clone().

template<class FuncType >

ROOT::Math::MultiNumGradFunction::MultiNumGradFunction	(	FuncType	f,
		int	n
	)

inline

Constructor from a generic function (pointer or reference) and number of dimension implementiong operator () (double * x)

Definition at line 74 of file MultiNumGradFunction.h.

ROOT::Math::MultiNumGradFunction::~MultiNumGradFunction ( )

inline

Destructor (no operations)

Definition at line 86 of file MultiNumGradFunction.h.

Member Function Documentation

IMultiGenFunction* ROOT::Math::MultiNumGradFunction::Clone ( ) const

inlinevirtual

Clone a function.

Each derived class must implement their version of the Clone method

Implements ROOT::Math::IBaseFunctionMultiDim.

Definition at line 97 of file MultiNumGradFunction.h.

double ROOT::Math::MultiNumGradFunction::DoDerivative	(	const double *	x,
		unsigned int	icoord
	)		const

privatevirtual

function to evaluate the derivative with respect each coordinate.

To be implemented by the derived class

Implements ROOT::Math::IGradientMultiDim.

Definition at line 44 of file MultiNumGradFunction.cxx.

double ROOT::Math::MultiNumGradFunction::DoEval ( const double * x ) const

inlineprivatevirtual

Implementation of the evaluation function.

Must be implemented by derived classes

Implements ROOT::Math::IBaseFunctionMultiDim.

Definition at line 122 of file MultiNumGradFunction.h.

double ROOT::Math::MultiNumGradFunction::GetDerivPrecision ( )

static

get precision value used for calculating the derivative step-size

Definition at line 58 of file MultiNumGradFunction.cxx.

unsigned int ROOT::Math::MultiNumGradFunction::NCalls ( ) const

inline

Definition at line 95 of file MultiNumGradFunction.h.

Referenced by ROOT::Math::GSLSimAnMinimizer::NCalls(), and ROOT::Math::GSLMinimizer::NCalls().

unsigned int ROOT::Math::MultiNumGradFunction::NDim ( ) const

inlinevirtual

Retrieve the dimension of the function.

Implements ROOT::Math::IBaseFunctionMultiDim.

Definition at line 93 of file MultiNumGradFunction.h.

void ROOT::Math::MultiNumGradFunction::SetDerivPrecision ( double eps )

static

precision value used for calculating the derivative step-size h = eps * |x|.

The default is 0.001, give a smaller in case function chanes rapidly

Definition at line 56 of file MultiNumGradFunction.cxx.

void ROOT::Math::MultiNumGradFunction::SetOwnership ( bool on = true )

inline

Definition at line 109 of file MultiNumGradFunction.h.

Referenced by ROOT::Math::GSLSimAnMinimizer::Minimize().

Member Data Documentation

unsigned int ROOT::Math::MultiNumGradFunction::fDim

private

Definition at line 132 of file MultiNumGradFunction.h.

Referenced by NDim().

const IMultiGenFunction* ROOT::Math::MultiNumGradFunction::fFunc

private

Definition at line 131 of file MultiNumGradFunction.h.

Referenced by Clone(), DoDerivative(), DoEval(), MultiNumGradFunction(), and ~MultiNumGradFunction().

double ROOT::Math::MultiNumGradFunction::fgEps = 0.001

staticprivate

Definition at line 136 of file MultiNumGradFunction.h.

Referenced by DoDerivative(), GetDerivPrecision(), and SetDerivPrecision().

unsigned int ROOT::Math::MultiNumGradFunction::fNCalls

mutableprivate

Definition at line 133 of file MultiNumGradFunction.h.

Referenced by DoEval(), and NCalls().

bool ROOT::Math::MultiNumGradFunction::fOwner

private

Definition at line 134 of file MultiNumGradFunction.h.

Referenced by Clone(), SetOwnership(), and ~MultiNumGradFunction().

The documentation for this class was generated from the following files:

math/mathmore/inc/Math/MultiNumGradFunction.h
math/mathmore/src/MultiNumGradFunction.cxx

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation