galib::Individual< GeneType > Class Template Reference

Represents a single candidate solution in the population. More...

#include <Individual.h>

Public Member Functions
	Individual ()
	Default constructor. Initializes fitness to the maximum possible double value.
	Individual (std::size_t num_genes)
	Constructs an Individual with a specific number of genes.
std::size_t	size () const
	Returns the number of genes in the genotype.
std::vector< GeneType > &	getGenotype ()
	Returns a reference to the genotype vector.
const std::vector< GeneType > &	getGenotype () const
	Returns a constant reference to the genotype vector.
void	setGenotype (const std::vector< GeneType > &new_genotype)
	Sets the genotype by copying.
void	setGenotype (std::vector< GeneType > &&new_genotype) noexcept
	Sets the genotype by moving.
double	getFitness () const
	Gets the current fitness score.
void	setFitness (double new_fitness)
	Sets a new fitness score.
auto	operator<=> (const Individual &other) const
	Three-way comparison operator based on fitness (for minimization).
bool	operator== (const Individual &other) const
	Equality operator based on fitness.

Friends
std::ostream &	operator<< (std::ostream &os, const Individual &ind)
	Streams a summary of the individual (fitness and first few genes).

Detailed Description

template<typename GeneType = double>
class galib::Individual< GeneType >

Represents a single candidate solution in the population.

An Individual consists of a genotype (a vector of genes) and a fitness score. It supports comparison operators for sorting based on fitness (minimization).

Template Parameters

GeneType

The type of the genes (default: double).

Definition at line 23 of file Individual.h.

Constructor & Destructor Documentation

Individual() [1/2]

template<typename GeneType = double>

galib::Individual< GeneType >::Individual ( )

inline

Default constructor. Initializes fitness to the maximum possible double value.

Definition at line 34 of file Individual.h.

Individual() [2/2]

template<typename GeneType = double>

galib::Individual< GeneType >::Individual ( std::size_t  num_genes )

inlineexplicit

Constructs an Individual with a specific number of genes.

Parameters

num_genes

Number of genes in the genotype.

Definition at line 40 of file Individual.h.

Member Function Documentation

getFitness()

template<typename GeneType = double>

double galib::Individual< GeneType >::getFitness ( ) const

inline

Gets the current fitness score.

Returns

Fitness value.

Definition at line 77 of file Individual.h.

Referenced by galib::internal::MpiCommunicator< GeneType >::allReduceBest(), galib::TournamentSelection< GeneType >::select(), galib::BestNeighborSelection< GeneType >::select(), and galib::internal::BinarySerializer< GeneType >::serialize().

getGenotype() [1/2]

template<typename GeneType = double>

std::vector< GeneType > & galib::Individual< GeneType >::getGenotype ( )

inline

Returns a reference to the genotype vector.

Returns

Reference to the genotype.

Definition at line 53 of file Individual.h.

Referenced by galib::ArithmeticCrossover< GeneType >::crossover(), galib::SinglePointCrossover< GeneType >::crossover(), galib::UniformCrossover< GeneType >::crossover(), galib::BoundaryMutation< GeneType >::mutate(), galib::GaussianMutation< GeneType >::mutate(), galib::UniformMutation< GeneType >::mutate(), galib::DifferentialEvolutionGA< GeneType >::run(), and galib::internal::BinarySerializer< GeneType >::serialize().

getGenotype() [2/2]

template<typename GeneType = double>

const std::vector< GeneType > & galib::Individual< GeneType >::getGenotype ( ) const

inline

Returns a constant reference to the genotype vector.

Returns

Constant reference to the genotype.

Definition at line 59 of file Individual.h.

operator<=>()

template<typename GeneType = double>

auto galib::Individual< GeneType >::operator<=> ( const Individual< GeneType > &  other ) const

inline

Three-way comparison operator based on fitness (for minimization).

Parameters

other

The individual to compare against.

Definition at line 89 of file Individual.h.

operator==()

template<typename GeneType = double>

bool galib::Individual< GeneType >::operator== ( const Individual< GeneType > &  other ) const

inline

Equality operator based on fitness.

Parameters

other

The individual to compare against.

Definition at line 97 of file Individual.h.

setFitness()

template<typename GeneType = double>

void galib::Individual< GeneType >::setFitness ( double  new_fitness )

inline

Sets a new fitness score.

Parameters

new_fitness

The new fitness value.

Definition at line 83 of file Individual.h.

Referenced by galib::internal::BinarySerializer< GeneType >::deserialize(), galib::internal::BinarySerializer< GeneType >::deserialize(), and galib::DifferentialEvolutionGA< GeneType >::run().

setGenotype() [1/2]

template<typename GeneType = double>

void galib::Individual< GeneType >::setGenotype ( const std::vector< GeneType > &  new_genotype )

inline

Sets the genotype by copying.

Parameters

new_genotype

The new genotype vector.

Definition at line 65 of file Individual.h.

Referenced by galib::internal::BinarySerializer< GeneType >::deserialize(), and galib::internal::BinarySerializer< GeneType >::deserialize().

setGenotype() [2/2]

template<typename GeneType = double>

void galib::Individual< GeneType >::setGenotype ( std::vector< GeneType > &&  new_genotype )

inlinenoexcept

Sets the genotype by moving.

Parameters

new_genotype

The new genotype vector.

Definition at line 71 of file Individual.h.

size()

template<typename GeneType = double>

std::size_t galib::Individual< GeneType >::size ( ) const

inline

Returns the number of genes in the genotype.

Returns

Size of the genotype vector.

Definition at line 47 of file Individual.h.

Referenced by galib::ArithmeticCrossover< GeneType >::crossover(), and galib::UniformCrossover< GeneType >::crossover().

Friends And Related Symbol Documentation

operator<<

template<typename GeneType = double>

std::ostream & operator<< ( std::ostream &  os, const Individual< GeneType > &  ind  )

friend

Streams a summary of the individual (fitness and first few genes).

Definition at line 104 of file Individual.h.

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

• include/core/Individual.h