Evolver Class Reference

Class that performs a genetic algorithm. More...

#include <evolver.h>

Inheritance diagram for Evolver:

List of all members.

Public Member Functions
	Evolver (int nGenes, int nIndividuals, int nPopulations)
void	setPopulationData (int nGenes, int nIndividuals, int nPopulations)
void	evolve (int nSteps, int populationMatchingPeriod)
void	setRescaleLimits (double low, double high)
void	setRescaleCycles (int rescaleCycles)
void	rescale ()
Public Attributes
vec	allBestGenes
Protected Member Functions
virtual double	fitness (vec &coefficients, int population, int individual)=0
void	updateBest ()
Protected Attributes
int	nIndividuals
int	nGenes
int	nPopulations
int	cycle
long *	idum
double	scale
double	lowScaleLimit
double	highScaleLimit
double	initialLowScaleLimit
double	initialHighScaleLimit
double	rescalePrecisionLimit
vec **	populations
uvec *	bestIndices
vec *	values
double	allBestValue
int	allBestIndex
int	allBestPopulationIndex
int	rescaleCycles
int	cyclesSinceLastImprovement
int	cyclesSinceLastRescale
double	lastWorkingScale
bool	veryFirst

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Detailed Description

Class that performs a genetic algorithm.

This class must be inherited and have its fitness function defined to be used.

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Member Function Documentation

void Evolver::evolve	(	int	nSteps,
		int	populationMatchingPeriod
	)

The evolutionary algorithm. Runs for the given number of cycles, uses the fitness function on all individuals' genes and ranks them each cycle. Then the best individuals are mated to produce offspring while the offspring and worst individuals are mutated. Some new individuals are introduced. See the report for more information.

void Evolver::rescale

(

)

Updates the scaling of new suggestions for mutations within the given scale. This works logarithmically so that it is a uniform probability for the logarithmic powers between the scale limits.

void Evolver::setPopulationData	(	int	nGenes,
		int	nIndividuals,
		int	nPopulations
	)

Defines the number of genes, populations and individuals and allocates memory to these.

Warning:

This must be called only once, as there is no memory clean up if called twice!

Todo:

Fix memory leak

void Evolver::updateBest

(

)

[protected]

Updates the scoreboard over which individuals are best within each population.

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

• evolver/evolver.h
• evolver/evolver.cpp