apfel::Observable< T > Class Template Reference

The Observable class encapsulates sets of operators and sets of T-type objects for an easy computation of observables deriving from the convolution of the two. This class can contain an arbitrary number of such pairs that are separatately convoluted and joint when the obeservable is computed by means of the "Evaluate" function. More...

#include <observable.h>

Classes
struct	ConvolutionPair
	This structure contains a pair of sets of coefficient functions and of objects. More...

Public Member Functions
	Observable ()
	The Observable empty constructor.
	Observable (std::vector< ConvolutionPair > ConvPair)
	The Observable constructor.
	Observable (std::function< Set< Operator >(double const &)> const &CoefficientFunctions, std::function< Set< T >(double const &)> const &Objects)
	The Observable constructor.
void	AddConvolutionPair (std::function< Set< Operator >(double const &)> const &CoefficientFunctions, std::function< Set< T >(double const &)> const &Objects)
	Function to add a convolution pair.
void	SetObjects (std::function< Set< T >(double const &)> const &Objects, int const &ip=0)
	Set the set of ditributions keeping the same set of coefficient functions.
Functions that evaluate the the observable at the scale
Q.
T	Evaluate (double const &Q) const
	This function returns the observable as a distribution.
double	Evaluate (double const &x, double const &Q) const
	This function returns the observable in Q interpolated in x.

Public Attributes
std::function< Set< Operator >(double const &)	GetCoefficientFunctions )(int const &ip=0) const
	Get the set of coefficient functions.

Private Attributes
std::vector< ConvolutionPair >	_ConvPair

Detailed Description

template<class T = Distribution>
class apfel::Observable< T >

The Observable class encapsulates sets of operators and sets of T-type objects for an easy computation of observables deriving from the convolution of the two. This class can contain an arbitrary number of such pairs that are separatately convoluted and joint when the obeservable is computed by means of the "Evaluate" function.

Constructor & Destructor Documentation

Observable() [1/3]

template<class T = Distribution>

apfel::Observable< T >::Observable

(

)

The Observable empty constructor.

Observable() [2/3]

template<class T = Distribution>

apfel::Observable< T >::Observable

(

std::vector< ConvolutionPair >

ConvPair

)

The Observable constructor.

Parameters

ConvPair

a vector of ConvolutionPair structures containing pairs of Set<Operator>-valued and Set<T>-valued functions

Observable() [3/3]

template<class T = Distribution>

apfel::Observable< T >::Observable	(	std::function< Set< Operator >(double const &)> const &	CoefficientFunctions,
		std::function< Set< T >(double const &)> const &	Objects )

The Observable constructor.

Parameters

CoefficientFunctions	a Set<Operator>-valued function returning the operators
Objects	a Set<T>-valued function returning the relevant object

Member Function Documentation

AddConvolutionPair()

template<class T = Distribution>

void apfel::Observable< T >::AddConvolutionPair	(	std::function< Set< Operator >(double const &)> const &	CoefficientFunctions,
		std::function< Set< T >(double const &)> const &	Objects )

Function to add a convolution pair.

Parameters

CoefficientFunctions	a Set<Operator>-valued function returning the operators
Objects	a Set<T>-valued function returning the relevant object

Evaluate() [1/2]

template<class T = Distribution>

T apfel::Observable< T >::Evaluate

(

double const &

Q

)

const

This function returns the observable as a distribution.

Parameters

Q	the scale where the observable has to be evaluated

Returns

the observable in Q as a distribution

Evaluate() [2/2]

template<class T = Distribution>

double apfel::Observable< T >::Evaluate	(	double const &	x,
		double const &	Q ) const

This function returns the observable in Q interpolated in x.

Parameters

x	the value to be interpolate on the x-space grid
Q	the scale where the observable has to be evaluated

Returns

the observable in Q interpolated in x

SetObjects()

template<class T = Distribution>

void apfel::Observable< T >::SetObjects	(	std::function< Set< T >(double const &)> const &	Objects,
		int const &	ip = 0 )

Set the set of ditributions keeping the same set of coefficient functions.

Parameters

Objects	the new set of objects
ip	index of the convolution-pair vector (default: 0)

Member Data Documentation

_ConvPair

template<class T = Distribution>

std::vector<ConvolutionPair> apfel::Observable< T >::_ConvPair

private

GetCoefficientFunctions

template<class T = Distribution>

std::function< Set< Operator >(double const &) apfel::Observable< T >::GetCoefficientFunctions) (int const &ip=0) const

Get the set of coefficient functions.

Parameters

ip	index of the convolution-pair vector (default: 0)

Returns

the set of coefficient functions.

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

• /Users/vb262523/Codes/apfelxx/inc/apfel/observable.h