Package net.bmahe.genetics4j.neat

Class NeatUtils

java.lang.Object

net.bmahe.genetics4j.neat.NeatUtils

public class NeatUtils
extends Object

Constructor Summary

Constructors

Modifier	Constructor	Description
private	NeatUtils()

Method Summary

Modifier and Type	Method	Description
static float	compatibilityDistance(List<Connection> firstConnections, List<Connection> secondConnections, float c1, float c2, float c3)
static float	compatibilityDistance(Genotype genotype1, Genotype genotype2, int chromosomeIndex, float c1, float c2, float c3)
static Map<Integer,Set<Connection>>	computeBackwardConnections(List<Connection> connections)
static Map<Integer,Set<Integer>>	computeBackwardLinks(List<Connection> connections)
static Set<Integer>	computeDeadNodes(List<Connection> connections, Map<Integer,Set<Integer>> forwardConnections, Map<Integer,Set<Integer>> backwardConnections, Set<Integer> outputNodeIndices)	Working backward from the output nodes, we identify the nodes that did not get visited as dead nodes
static Map<Integer,Set<Integer>>	computeForwardLinks(List<Connection> connections)
static List<List<Integer>>	partitionLayersNodes(Set<Integer> inputNodeIndices, Set<Integer> outputNodeIndices, List<Connection> connections)
static <T extends Comparable<T>> List<Species<T>>	speciate(RandomGenerator random, SpeciesIdGenerator speciesIdGenerator, List<Species<T>> seedSpecies, Population<T> population, BiPredicate<Individual<T>,Individual<T>> speciesPredicate)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

NeatUtils

private NeatUtils()

Method Details

computeDeadNodes

public static Set<Integer> computeDeadNodes(List<Connection> connections,
 Map<Integer,Set<Integer>> forwardConnections,
 Map<Integer,Set<Integer>> backwardConnections,
 Set<Integer> outputNodeIndices)

Working backward from the output nodes, we identify the nodes that did not get visited as dead nodes

Parameters:

connections -

forwardConnections -

backwardConnections -

outputNodeIndices -

Returns:

computeForwardLinks

public static Map<Integer,Set<Integer>> computeForwardLinks(List<Connection> connections)

computeBackwardLinks

public static Map<Integer,Set<Integer>> computeBackwardLinks(List<Connection> connections)

computeBackwardConnections

public static Map<Integer,Set<Connection>> computeBackwardConnections(List<Connection> connections)

partitionLayersNodes

public static List<List<Integer>> partitionLayersNodes(Set<Integer> inputNodeIndices,
 Set<Integer> outputNodeIndices,
 List<Connection> connections)

compatibilityDistance

public static float compatibilityDistance(List<Connection> firstConnections,
 List<Connection> secondConnections,
 float c1,
 float c2,
 float c3)

compatibilityDistance

public static float compatibilityDistance(Genotype genotype1,
 Genotype genotype2,
 int chromosomeIndex,
 float c1,
 float c2,
 float c3)

speciate

public static <T extends Comparable<T>>
List<Species<T>> speciate(RandomGenerator random,
 SpeciesIdGenerator speciesIdGenerator,
 List<Species<T>> seedSpecies,
 Population<T> population,
 BiPredicate<Individual<T>,Individual<T>> speciesPredicate)