Package org.aksw.limes.core.ml.algorithm.eagle.core

Class PseudoFMeasureFitnessFunction

java.lang.Object

org.jgap.gp.GPFitnessFunction

org.aksw.limes.core.ml.algorithm.eagle.core.IGPFitnessFunction

org.aksw.limes.core.ml.algorithm.eagle.core.PseudoFMeasureFitnessFunction

All Implemented Interfaces:

Serializable, IFitnessFunction

public class PseudoFMeasureFitnessFunction
extends IGPFitnessFunction

Fitness function to evolve metric expression using a PseudoMeasue

Version:

Jul 21, 2016

Author:

Klaus Lyko (lyko@informatik.uni-leipzig.de), Tommaso Soru (tsoru@informatik.uni-leipzig.de), Mohamed Sherif (sherif@informatik.uni-leipzig.de)

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
ExecutionEngine	engine

Fields inherited from class org.jgap.gp.GPFitnessFunction

MAX_FITNESS_VALUE, NO_FITNESS_VALUE

Method Summary

Modifier and Type	Method	Description
void	addToReference(AMapping m)
AMapping	calculateMapping(org.jgap.gp.IGPProgram p)
Double	calculatePseudoMeasure(org.jgap.gp.IGPProgram p)
double	calculateRawFitness(org.jgap.gp.IGPProgram p)	Determine fitness of the individual p;
double	calculateRawMeasure(org.jgap.gp.IGPProgram p)
void	destroy()	Needed between several runs
protected double	evaluate(org.jgap.gp.IGPProgram program)
void	fillCachesIncrementally(AMapping matches)
double	getBeta()
static PseudoFMeasureFitnessFunction	getInstance(LinkSpecGeneticLearnerConfig a_config, PseudoFMeasure pfm, ACache c1, ACache c2)	Singleton pattern
AMapping	getMapping(ACache sC, ACache tC, LinkSpecification spec)	Get or create a mapping from a link specification (Metric String + Acceptance threshold: 0<=threshold<=1).
PseudoFMeasure	getMeasure()
void	setBeta(double beta)
void	setMeasure(PseudoFMeasure pfm)

Methods inherited from class org.jgap.gp.GPFitnessFunction

getFitnessValue, getLastComputedFitnessValue, GPFitnessFunction

Methods inherited from class java.lang.Object

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

Field Detail

engine

public ExecutionEngine engine

Method Detail

getInstance

public static PseudoFMeasureFitnessFunction getInstance(LinkSpecGeneticLearnerConfig a_config,
                                                        PseudoFMeasure pfm,
                                                        ACache c1,
                                                        ACache c2)

Singleton pattern

Parameters:

a_config - LinkSpecGeneticLearnerConfig

pfm - PseudoFMeasure

c1 - Cache

c2 - Cache

Returns:

instance of PseudoFMeasure Fitness Function

evaluate

protected double evaluate(org.jgap.gp.IGPProgram program)

Specified by:

evaluate in class org.jgap.gp.GPFitnessFunction

calculateRawFitness

public double calculateRawFitness(org.jgap.gp.IGPProgram p)

Determine fitness of the individual p;

Parameters:

p - GP programs

Returns:

1-PseudoFMeasure. Or if something wents wrong either 5d, iff p isn't fulfilling all constraints. 8d if executing p results in memory error.

calculateMapping

public AMapping calculateMapping(org.jgap.gp.IGPProgram p)

calculatePseudoMeasure

public Double calculatePseudoMeasure(org.jgap.gp.IGPProgram p)

Parameters:

p - GP programs

Returns:

PseudoMeasure

getMapping

public AMapping getMapping(ACache sC,
                           ACache tC,
                           LinkSpecification spec)

Get or create a mapping from a link specification (Metric String + Acceptance threshold: 0<=threshold<=1).

Parameters:

spec - the link specification

Returns:

Mapping m={sURI, tURI} of all pairs who satisfy the metric.

destroy

public void destroy()

Needed between several runs

getMeasure

public PseudoFMeasure getMeasure()

setMeasure

public void setMeasure(PseudoFMeasure pfm)

getBeta

public double getBeta()

setBeta

public void setBeta(double beta)

calculateRawMeasure

public double calculateRawMeasure(org.jgap.gp.IGPProgram p)

addToReference

public void addToReference(AMapping m)

Specified by:

addToReference in class IGPFitnessFunction

fillCachesIncrementally

public void fillCachesIncrementally(AMapping matches)

Specified by:

fillCachesIncrementally in class IGPFitnessFunction