GradFunctor1D class for one-dimensional gradient functions.

It is used to wrap in a very C++ callable object to make a 1D gradient functions. It can be constructed in three different way:

from an object implementing both double operator()( double ) for the function evaluation and double Derivative(double ) for the partial derivatives
from an object implementing any member function like Foo::XXX(double ) for the function evaluation and any other member function like Foo::YYY(double ) for the derivative.
from an 2 function objects implementing double operator()( double ) . One object provides the function evaluation, the other the derivative.

Definition at line 705 of file Functor.h.

Public Types
typedef FunctorImpl< IGradientFunctionOneDim >	Impl

typedef IGradientFunctionOneDim::BaseFunc	ImplBase

Public Types inherited from ROOT::Math::IGradientFunctionOneDim
typedef IBaseFunctionOneDim	BaseFunc

typedef IGradientOneDim	BaseGrad

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

Public Member Functions
	GradFunctor1D ()
	Default constructor. More...

template<typename Func >
	GradFunctor1D (const Func &f)
	construct from an object with the right signature implementing both operator() (double x) and Derivative(double x) More...

template<class PtrObj , typename MemFn , typename GradMemFn >
	GradFunctor1D (const PtrObj &p, MemFn memFn, GradMemFn gradFn)
	construct from a pointer to class and two pointers to member functions, one for the function evaluation and the other for the derivative. More...

template<typename Func , typename GradFunc >
	GradFunctor1D (const Func &f, const GradFunc &g)
	construct from two 1D function objects More...

virtual	~GradFunctor1D ()
	Destructor (no operations) More...

	GradFunctor1D (const GradFunctor1D &rhs)
	Copy constructor for Functor based on ROOT::Math::IGradFunction. More...

GradFunctor1D &	operator= (const GradFunctor1D &rhs)
	Assignment operator. More...

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

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

virtual void	FdF (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::IBaseFunctionOneDim
	IBaseFunctionOneDim ()

virtual	~IBaseFunctionOneDim ()
	virtual destructor More...

double	operator() (double x) const
	Evaluate the function at a point x Use the a pure virtual private method DoEval which must be implemented by sub-classes. More...

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

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

double	Derivative (double x) const
	Return the derivative of the function at a point x Use the private method DoDerivative. More...

double	Derivative (const double *x) const
	Compatibility method with multi-dimensional interface for partial derivative. More...

void	Gradient (const double x, double g) const
	Compatibility method with multi-dimensional interface for Gradient. More...

void	FdF (const double x, double &f, double df) const
	Compatibility method with multi-dimensional interface for Gradient and function evaluation. More...

Private Member Functions
double	DoEval (double x) const
	implementation of the evaluation function. Must be implemented by derived classes More...

double	DoDerivative (double x) const
	function to evaluate the derivative with respect each coordinate. More...

Private Attributes
std::auto_ptr< Impl >	fImpl

#include <Math/Functor.h>

Inheritance diagram for ROOT::Math::GradFunctor1D:

Collaboration diagram for ROOT::Math::GradFunctor1D:

Member Typedef Documentation

typedef FunctorImpl<IGradientFunctionOneDim> ROOT::Math::GradFunctor1D::Impl

Definition at line 710 of file Functor.h.

typedef IGradientFunctionOneDim::BaseFunc ROOT::Math::GradFunctor1D::ImplBase

Definition at line 711 of file Functor.h.

Constructor & Destructor Documentation

ROOT::Math::GradFunctor1D::GradFunctor1D ( )

inline

Default constructor.

Definition at line 717 of file Functor.h.

Referenced by Clone().

template<typename Func >

ROOT::Math::GradFunctor1D::GradFunctor1D ( const Func & f )

inline

construct from an object with the right signature implementing both operator() (double x) and Derivative(double x)

Definition at line 725 of file Functor.h.

template<class PtrObj , typename MemFn , typename GradMemFn >

ROOT::Math::GradFunctor1D::GradFunctor1D	(	const PtrObj &	p,
		MemFn	memFn,
		GradMemFn	gradFn
	)

inline

construct from a pointer to class and two pointers to member functions, one for the function evaluation and the other for the derivative.

The member functions must take a double as argument and return a double

Definition at line 736 of file Functor.h.

template<typename Func , typename GradFunc >

ROOT::Math::GradFunctor1D::GradFunctor1D	(	const Func &	f,
		const GradFunc &	g
	)

inline

construct from two 1D function objects

Definition at line 746 of file Functor.h.

virtual ROOT::Math::GradFunctor1D::~GradFunctor1D ( )

inlinevirtual

Destructor (no operations)

Definition at line 753 of file Functor.h.

ROOT::Math::GradFunctor1D::GradFunctor1D ( const GradFunctor1D & rhs )

inline

Copy constructor for Functor based on ROOT::Math::IGradFunction.

Definition at line 759 of file Functor.h.

Member Function Documentation

ImplBase* ROOT::Math::GradFunctor1D::Clone ( ) const

inlinevirtual

Clone a function.

Each derived class will implement their version of the provate DoClone method

Implements ROOT::Math::IBaseFunctionOneDim.

Definition at line 782 of file Functor.h.

double ROOT::Math::GradFunctor1D::DoDerivative ( double x ) const

inlineprivatevirtual

function to evaluate the derivative with respect each coordinate.

To be implemented by the derived class

Implements ROOT::Math::IGradientOneDim.

Definition at line 793 of file Functor.h.

double ROOT::Math::GradFunctor1D::DoEval ( double x ) const

inlineprivatevirtual

implementation of the evaluation function. Must be implemented by derived classes

Implements ROOT::Math::IBaseFunctionOneDim.

Definition at line 788 of file Functor.h.

GradFunctor1D& ROOT::Math::GradFunctor1D::operator= ( const GradFunctor1D & rhs )

inline

Assignment operator.

Definition at line 771 of file Functor.h.

Member Data Documentation

std::auto_ptr<Impl> ROOT::Math::GradFunctor1D::fImpl

private

Definition at line 797 of file Functor.h.

Referenced by DoDerivative(), DoEval(), GradFunctor1D(), and operator=().

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

math/mathcore/inc/Math/Functor.h

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation