The Crossover structure that encapsulates the crossover operation and its configuration in evolutionary algorithm. More...

#include <Crossover.hh>

Public Member Functions
	Crossover (double crossoverIndividualRate=0.45, CrossoverSelectionType selectionType=CrossoverSelectionType::PSEUDO_ROULETTE, double pseudoRouletteRandomPortion=0.3, double crossoverPhaseRate=1.0, std::mt19937_64::result_type seed=std::random_device{}())
	Crossover - Constructor. More...

void	Perform (const std::vector< std::unique_ptr< EvoScript >> &inputPopulation)
	Perform - the function that performs the crossover phase. More...

Public Attributes
std::vector< std::unique_ptr< EvoScript > >	populationAfter {}
	Population after the crossover operation is performed. More...

double	crossoverIndividualRate = 0.0
	Average rate of crossover. If N is the population.size(), then around (N*crossoverIndividualRate) children will be produced.

CrossoverSelectionType	selectionType = CrossoverSelectionType::RANDOM
	The method that chooses parents to be recombined.

double	pseudoRouletteRandomPortion = 0.0
	Pseudoroullete selects pseudoRouletteRandomPortion individuals at random and 1-pseudoRouletteRandomPortion according to roulette.

double	crossoverPhaseRate = 0.0
	Probability of a crossover phase to happen (globally). If a crossover is included in the algorithm, this value should most likely be equal to 1.0.

Protected Member Functions
virtual void	CrossoverFunctionOnePoint (EvoScript &individual1, EvoScript &individual2)

virtual void	CrossoverFunctionMultiPoint (EvoScript &individual1, EvoScript &individual2, size_t length)

virtual void	CrossoverIndividuals (EvoScript &individual1, EvoScript &individual2)

Protected Attributes
std::mt19937_64	randGen

Detailed Description

The Crossover structure that encapsulates the crossover operation and its configuration in evolutionary algorithm.

Constructor & Destructor Documentation

◆ Crossover()

grail::evolution::Crossover::Crossover	(	double	crossoverIndividualRate = `0.45`,
		CrossoverSelectionType	selectionType = `CrossoverSelectionType::PSEUDO_ROULETTE`,
		double	pseudoRouletteRandomPortion = `0.3`,
		double	crossoverPhaseRate = `1.0`,
		std::mt19937_64::result_type	seed = `std::random_device{}()`
	)

Crossover - Constructor.

Parameters

crossoverIndividualRate	- average rate of crossover. If N is the population.size(), then around (N*crossoverIndividualRate) children will be produced.
selectionType	- the method that chooses parents to be recombined. See CrossoverSelectionType.
pseudoRouletteRandomPortion	- pseudoroullete selects pseudoRouletteRandomPortion individuals at random and 1-pseudoRouletteRandomPortion according to roulette.
crossoverPhaseRate	- probability of a crossover phase to happen (globally). If a crossover is included in the algorithm, this value should most likely be equal to 1.0.
seed	- initial seed for random numbers generator.

Member Function Documentation

◆ Perform()

void grail::evolution::Crossover::Perform ( const std::vector< std::unique_ptr< EvoScript >> & inputPopulation )

Perform - the function that performs the crossover phase.

Parameters

inputPopulation - the population containing individuals that are candidates for the crossover. Please note that the crossover might not choose all individuals depending on its configuration.

Member Data Documentation

◆ populationAfter

std::vector<std::unique_ptr<EvoScript> > grail::evolution::Crossover::populationAfter {}

Population after the crossover operation is performed.

The documentation for this struct was generated from the following files:

GrailEvolution/Crossover.hh
GrailEvolution/Crossover.cpp

Public Member Functions

Public Attributes

Protected Member Functions