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

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

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

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

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

virtual IBaseFunctionOneDim *	Clone () const =0
	Clone a function. More...

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

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

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

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

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

virtual void	FdF (double x, double &f, double &df) const =0
	Optimized method to evaluate at the same time the function value and derivative at a point x. More...

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

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

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

Private Attributes
std::unique_ptr< Impl >	fImpl

#include <Math/Functor.h>

Inheritance diagram for ROOT::Math::GradFunctor1D:

[legend]

Member Typedef Documentation

◆ Impl

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

Definition at line 700 of file Functor.h.

◆ ImplBase

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

Definition at line 701 of file Functor.h.

Constructor & Destructor Documentation

◆ GradFunctor1D() [1/5]

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

inline

Default constructor.

Definition at line 707 of file Functor.h.

◆ GradFunctor1D() [2/5]

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 715 of file Functor.h.

◆ GradFunctor1D() [3/5]

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 726 of file Functor.h.

◆ GradFunctor1D() [4/5]

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 736 of file Functor.h.

◆ ~GradFunctor1D()

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

inlinevirtual

Destructor (no operations)

Definition at line 743 of file Functor.h.

◆ GradFunctor1D() [5/5]

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

inline

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

Definition at line 749 of file Functor.h.

Member Function Documentation

◆ Clone()

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 769 of file Functor.h.

◆ DoDerivative()

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 780 of file Functor.h.

◆ DoEval()

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 775 of file Functor.h.

◆ operator=()

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

inline

Assignment operator.

Definition at line 761 of file Functor.h.

Member Data Documentation

◆ fImpl

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

private

Definition at line 784 of file Functor.h.

Libraries for ROOT::Math::GradFunctor1D:

[legend]

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Member Typedef Documentation

◆ Impl

◆ ImplBase

Constructor & Destructor Documentation

◆ GradFunctor1D() [1/5]

◆ GradFunctor1D() [2/5]

◆ GradFunctor1D() [3/5]

◆ GradFunctor1D() [4/5]

◆ ~GradFunctor1D()

◆ GradFunctor1D() [5/5]

Member Function Documentation

◆ Clone()

◆ DoDerivative()

◆ DoEval()

◆ operator=()

Member Data Documentation

◆ fImpl