de::mutation_strategy Class Reference

#include <mutation_strategy.hpp>

Inheritance diagram for de::mutation_strategy:

List of all members.

Classes
class	Urn
Public Types
typedef boost::tuple < individual_ptr, de::DVectorPtr >	mutation_info
Public Member Functions
	mutation_strategy (size_t varCount, const mutation_strategy_arguments &args)
virtual mutation_info	operator() (const population &pop, individual_ptr bestIt, size_t i)=0
size_t	varCount () const
double	weight () const
double	crossover () const
double	dither () const

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Detailed Description

A an abstract based class for mutation strategies

A mutation strategy defines how varaibles values are adjusted during the optimization process

Author:

adrian (12/1/2011)

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Member Typedef Documentation

typedef boost::tuple< individual_ptr, de::DVectorPtr > de::mutation_strategy::mutation_info

type for the tuple returned by the operator() member.

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Constructor & Destructor Documentation

de::mutation_strategy::mutation_strategy	(	size_t	varCount,
		const mutation_strategy_arguments &	args
	)		[inline]

constructs a mutation strategy

Author:

adrian (12/4/2011)

Parameters:

varCount	number of variables
args	mutation strategy arguments

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Member Function Documentation

double de::mutation_strategy::crossover

(

)

const [inline]

returns the crossover factor

Author:

adrian (12/4/2011)

Returns:

double

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double de::mutation_strategy::dither

(

)

const [inline]

returns the dither factor

Author:

adrian (12/4/2011)

Returns:

double

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virtual mutation_info de::mutation_strategy::operator()	(	const population &	pop,
		individual_ptr	bestIt,
		size_t	i
	)		[pure virtual]

performs the mutation

Author:

adrian (12/4/2011)

Parameters:

pop	a reference to the current population
bestIt	the best individual of the previous generation
i	the current individual index

Returns:

mutation_info tuple containing the mutated individual and a vector of doubles of the same size as the number of variables, used as origin to generate new values in case they exceed the limits imposed by the corresponding constraints

Implemented in de::mutation_strategy_5, de::mutation_strategy_4, de::mutation_strategy_3, de::mutation_strategy_2, and de::mutation_strategy_1.

size_t de::mutation_strategy::varCount

(

)

const [inline]

returns the number of variables

Author:

adrian (12/4/2011)

Returns:

size_t

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double de::mutation_strategy::weight

(

)

const [inline]

returns the weight factor

Author:

adrian (12/4/2011)

Returns:

double

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

• C:/dev/de/differentialevolution/mutation_strategy.hpp