Module es.upm.fi.cig.multictbnc

Package es.upm.fi.cig.multictbnc.learning.structure.optimisation.scores.bn

Class BNLogLikelihood

java.lang.Object

es.upm.fi.cig.multictbnc.learning.structure.optimisation.scores.AbstractLikelihood

es.upm.fi.cig.multictbnc.learning.structure.optimisation.scores.bn.BNLogLikelihood

All Implemented Interfaces:

BNScoreFunction

public class BNLogLikelihood
extends AbstractLikelihood
implements BNScoreFunction

Implements the log-likelihood score for Bayesian networks with nodes that have CPTs.

Constructor Summary

Constructors

Constructor	Description
BNLogLikelihood(String penalisationFunction)	Receives the name of the penalisation function for the structure complexity.

Method Summary

Modifier and Type	Method	Description
double	compute(BN<? extends Node> bn)	Computes the (penalised) log-likelihood score for a discrete Bayesian network.
String	getIdentifier()	Gets an identifier for the score function.

Methods inherited from class es.upm.fi.cig.multictbnc.learning.structure.optimisation.scores.AbstractLikelihood

getNamePenalisationFunction, getPenalisationFunction

Methods inherited from class java.lang.Object

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

Methods inherited from interface es.upm.fi.cig.multictbnc.learning.structure.optimisation.scores.bn.BNScoreFunction

getNamePenalisationFunction

Constructor Details

BNLogLikelihood

public BNLogLikelihood(String penalisationFunction)

Receives the name of the penalisation function for the structure complexity.

Parameters:

penalisationFunction - name of the penalisation function

Method Details

compute

public double compute(BN<? extends Node> bn)

Computes the (penalised) log-likelihood score for a discrete Bayesian network. This is done by computing the marginal log-likelihood of the graph. A uniform prior structure is assumed.

Specified by:

compute in interface BNScoreFunction

Parameters:

bn - a Bayesian network

Returns:

penalised log-likelihood score

getIdentifier

public String getIdentifier()

Description copied from interface: BNScoreFunction

Gets an identifier for the score function.

Specified by:

getIdentifier in interface BNScoreFunction

Returns:

identifier for the score function.