This class represents a test function with 2^D many optimal positions. More...

#include <two_cups_function.h>

Inheritance diagram for highprecisionpso::TwoCupsFunction:

Public Member Functions
mpf_t *	DistanceTo1DLocalOptimum (const std::vector< mpf_t * > &pos, int d)
	Calculates for a position and a dimension the next local optimum if only the value of the position in the specified dimension is varied and returns the distance to it. More...

mpf_t *	Eval (const std::vector< mpf_t * > &pos)
	Calculates the sum over a single dimensional function evaluated on each position entry. More...

std::string	GetName ()
	Returns a string representation of this object. More...

Public Member Functions inherited from highprecisionpso::Function
	Function ()
	A constructor. More...

	Function (double search_space_lower_bound, double search_space_upper_bound)
	A constructor, specifying the lower and upper search space bounds. More...

	Function (std::vector< double > search_space_lower_bound, std::vector< double > search_space_upper_bound)
	A constructor specifying the lower and upper search space bounds. More...

virtual	~Function ()
	The destructor. More...

virtual mpf_t *	DistanceTo1DLocalOptimumTernarySearch (const std::vector< mpf_t * > &pos, int d, mpf_t *start_distance)
	Calculates for a position and a dimension the next local optimum if only the value of the position in the specified dimension is varied and returns the distance to it. More...

mpf_t *	Evaluate (const std::vector< mpf_t * > &pos)
	This is the initial function for evaluation of a position. More...

virtual std::vector< mpf_t * >	GetLowerSearchSpaceBound ()
	Returns the lower search space bound of the search space for this objective function. More...

virtual std::vector< mpf_t * >	GetUpperSearchSpaceBound ()
	Returns the upper search space bound of the search space for this objective function. More...

void	InitSearchSpaceBounds ()
	Initializes the search space bounds. More...

void	SetFunctionBound (SearchSpaceBound *search_space_bound)
	Updates the bound of the search space according to the given data. More...

Detailed Description

This class represents a test function with 2^D many optimal positions.

Member Function Documentation

mpf_t* highprecisionpso::TwoCupsFunction::DistanceTo1DLocalOptimum	(	const std::vector< mpf_t * > &	pos,
		int	d
	)

virtual

Calculates for a position and a dimension the next local optimum if only the value of the position in the specified dimension is varied and returns the distance to it.

Parameters

pos	The position.
d	The index of the observed dimension.

Returns: min( abs( pos[d]-1 ), abs( pos[d]+1 ) ).

Reimplemented from highprecisionpso::Function.

mpf_t* highprecisionpso::TwoCupsFunction::Eval ( const std::vector< mpf_t * > & pos )

virtual

Calculates the sum over a single dimensional function evaluated on each position entry.

The single dimensional function performs in two different ways. If the position entry is not positive then the distance to -1 is calculated and the square of this distance is returned. If the position entry is positive then the distance to 1 is calculated and the fourth power of this distance is returned.

Parameters

pos	The position.

Returns: ∑_d=0..D-1tc( pos[d] ), where tc( x )= ( x + 1 )² if x is not positive and tc( x )= ( x -1 )⁴ if x is positive.

Implements highprecisionpso::Function.

std::string highprecisionpso::TwoCupsFunction::GetName ( )

virtual

Returns a string representation of this object.

Returns: The name of the object.

Implements highprecisionpso::Function.

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

src/function/two_cups_function.h

Public Member Functions

Detailed Description

Member Function Documentation