Package ec.gp.koza

Class KozaShortStatistics

java.lang.Object

ec.Statistics

ec.simple.SimpleShortStatistics

ec.gp.koza.KozaShortStatistics

All Implemented Interfaces:

Setup, Singleton, Serializable

public class KozaShortStatistics
extends SimpleShortStatistics

A Koza-style statistics generator, intended to be easily parseable with awk or other Unix tools. Prints fitness information, one generation (or pseudo-generation) per line. If gather-full is true, then timing information, number of nodes and depths of trees, etc. are also given. No final statistics information is given.

Each line represents a single generation. The first items on a line are always:

• The generation number
• (if do-time) how long initialization took in milliseconds, or how long the previous generation took to breed to form this generation
• (if do-time) How long evaluation took in milliseconds this generation

Then, (if do-subpops) the following items appear, once per each subpopulation:

• (if do-depth) [a b c...], representing the average depth of tree a, b, etc. of individuals this generation
• (if do-size) [a b c...], representing the average number of nodes used in tree a, b, etc. of individuals this generation
• (if do-size) The average size of an individual this generation
• (if do-size) The average size of an individual so far in the run
• (if do-size) The size of the best individual this generation
• (if do-size) The size of the best individual so far in the run
• The mean standardized fitness of the subpopulation this generation
• The best standardized fitness of the subpopulation this generation
• The best standardized fitness of the subpopulation so far in the run

Then the following items appear, for the whole population:

• (if do-depth) [a b c...], representing the average depth of tree a, b, etc. of individuals this generation
• (if do-size) [a b c...], representing the average number of nodes used in tree a, b, etc. of individuals this generation
• (if do-size) The average size of an individual this generation
• (if do-size) The average size of an individual so far in the run
• (if do-size) The size of the best individual this generation
• (if do-size) The size of the best individual so far in the run
• The mean standardized fitness of the subpopulation this generation
• The best standardized fitness of the subpopulation this generation
• The best standardized fitness of the subpopulation so far in the run

KozaStatistics assumes that every one of the Individuals in your population (and all subpopualtions) are GPIndividuals, and further that they all have the same number of trees. Besides the parameter below, KozaShortStatistics obeys all the SimpleShortStatistics parameters.

Parameters

base.do-depth bool = true or false (default)

(print depth information?)

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
boolean	doDepth
static final String	P_DO_DEPTH

Fields inherited from class ec.simple.SimpleShortStatistics

bestOfGeneration, bestSoFar, delimiter, doHeader, doSize, doSubpops, doTime, lastTime, modulus, P_COMPRESS, P_DELIMITER, P_DO_HEADER, P_DO_SIZE, P_DO_SUBPOPS, P_DO_TIME, P_FULL, P_STATISTICS_FILE, P_STATISTICS_MODULUS, statisticslog, totalFitnessThisGen, totalIndsSoFar, totalIndsThisGen, totalSizeSoFar, totalSizeThisGen

Fields inherited from class ec.Statistics

children, P_CHILD, P_MUZZLE, P_NUMCHILDREN, P_SILENT, P_SILENT_FILE, P_SILENT_PRINT, silentFile, silentPrint

Constructor Summary

Constructors

Constructor	Description
KozaShortStatistics()

Method Summary

Modifier and Type	Method	Description
protected void	gatherExtraSubpopStatistics(EvolutionState state, int subpop, int individual)
void	postInitializationStatistics(EvolutionState state)	GENERATIONAL: Called immediately after population initialization occurs.
protected void	prepareStatistics(EvolutionState state)
protected void	printExtraPopStatisticsBefore(EvolutionState state)
protected void	printExtraSubpopStatisticsBefore(EvolutionState state, int subpop)
void	setup(EvolutionState state, Parameter base)	Sets up the object by reading it from the parameters stored in state, built off of the parameter base base.

Methods inherited from class ec.simple.SimpleShortStatistics

gatherExtraPopStatistics, getBestSoFar, postBreedingStatistics, postEvaluationStatistics, preBreedingStatistics, preEvaluationStatistics, preInitializationStatistics, printExtraPopStatisticsAfter, printExtraSubpopStatisticsAfter

Methods inherited from class ec.Statistics

enteringInitialPopulationStatistics, enteringSteadyStateStatistics, finalStatistics, generationBoundaryStatistics, individualsBredStatistics, individualsEvaluatedStatistics, postCheckpointStatistics, postPostBreedingExchangeStatistics, postPreBreedingExchangeStatistics, preCheckpointStatistics, prePostBreedingExchangeStatistics, prePreBreedingExchangeStatistics

Methods inherited from class java.lang.Object

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

Field Details

P_DO_DEPTH

public static final String P_DO_DEPTH

See Also:

• Constant Field Values

doDepth

public boolean doDepth

Constructor Details

KozaShortStatistics

public KozaShortStatistics()

Method Details

setup

public void setup(EvolutionState state,
 Parameter base)

Description copied from interface: Setup

Sets up the object by reading it from the parameters stored in state, built off of the parameter base base. If an ancestor implements this method, be sure to call super.setup(state,base); before you do anything else.

Specified by:

setup in interface Setup

Overrides:

setup in class SimpleShortStatistics

postInitializationStatistics

public void postInitializationStatistics(EvolutionState state)

Description copied from class: Statistics

GENERATIONAL: Called immediately after population initialization occurs.

Overrides:

postInitializationStatistics in class SimpleShortStatistics

prepareStatistics

protected void prepareStatistics(EvolutionState state)

Overrides:

prepareStatistics in class SimpleShortStatistics

gatherExtraSubpopStatistics

protected void gatherExtraSubpopStatistics(EvolutionState state,
 int subpop,
 int individual)

Overrides:

gatherExtraSubpopStatistics in class SimpleShortStatistics

printExtraSubpopStatisticsBefore

protected void printExtraSubpopStatisticsBefore(EvolutionState state,
 int subpop)

Overrides:

printExtraSubpopStatisticsBefore in class SimpleShortStatistics

printExtraPopStatisticsBefore

protected void printExtraPopStatisticsBefore(EvolutionState state)

Overrides:

printExtraPopStatisticsBefore in class SimpleShortStatistics