Package edu.cmu.tetrad.bayes

Class JunctionTreeUpdater

java.lang.Object

edu.cmu.tetrad.bayes.JunctionTreeUpdater

All Implemented Interfaces:

BayesUpdater, ManipulatingBayesUpdater, TetradSerializable, Serializable

public class JunctionTreeUpdater
extends Object
implements ManipulatingBayesUpdater

Jan 21, 2020 11:03:09 AM

Author:

Kevin V. Bui (kvb2@pitt.edu)

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
JunctionTreeUpdater(BayesIm bayesIm)
JunctionTreeUpdater(BayesIm bayesIm, Evidence evidence)

Method Summary

Modifier and Type	Method	Description
double[]	calculatePriorMarginals(int nodeIndex)
double[]	calculateUpdatedMarginals(int nodeIndex)
BayesIm	getBayesIm()
Evidence	getEvidence()
double	getJointMarginal(int[] variables, int[] values)
BayesIm	getManipulatedBayesIm()
Graph	getManipulatedGraph()
double	getMarginal(int variable, int category)
BayesIm	getUpdatedBayesIm()
boolean	isJointMarginalSupported()
void	setEvidence(Evidence evidence)	Sets new evidence for the updater.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

JunctionTreeUpdater

public JunctionTreeUpdater(BayesIm bayesIm)

JunctionTreeUpdater

public JunctionTreeUpdater(BayesIm bayesIm,
 Evidence evidence)

Method Details

getManipulatedBayesIm

public BayesIm getManipulatedBayesIm()

Specified by:

getManipulatedBayesIm in interface ManipulatingBayesUpdater

Returns:

the Bayes instantiated model after manipulations have been applied.

getManipulatedGraph

public Graph getManipulatedGraph()

Specified by:

getManipulatedGraph in interface ManipulatingBayesUpdater

Returns:

the graph for the manipulated BayesIm.

getEvidence

public Evidence getEvidence()

Specified by:

getEvidence in interface ManipulatingBayesUpdater

Returns:

a defensive copy of the evidence.

setEvidence

public void setEvidence(Evidence evidence)

Description copied from interface: ManipulatingBayesUpdater

Sets new evidence for the updater. Once this is called, old updating results should not longer be available.

Specified by:

setEvidence in interface BayesUpdater

Specified by:

setEvidence in interface ManipulatingBayesUpdater

getUpdatedBayesIm

public BayesIm getUpdatedBayesIm()

Specified by:

getUpdatedBayesIm in interface ManipulatingBayesUpdater

Returns:

the updated Bayes IM--that is, the Bayes IM in which all probabilities of variables conditional on their parents have been updated.

getMarginal

public double getMarginal(int variable,
 int category)

Specified by:

getMarginal in interface BayesUpdater

Specified by:

getMarginal in interface ManipulatingBayesUpdater

Returns:

P(variable = category | evidence) where evidence is getEvidence().

isJointMarginalSupported

public boolean isJointMarginalSupported()

Specified by:

isJointMarginalSupported in interface BayesUpdater

Returns:

true if the getJointMarginal() method is supported.

getJointMarginal

public double getJointMarginal(int[] variables,
 int[] values)

Specified by:

getJointMarginal in interface BayesUpdater

Returns:

P(variables[i] = values[i] | evidence), where evidence is getEvidence().

getBayesIm

public BayesIm getBayesIm()

Specified by:

getBayesIm in interface BayesUpdater

Returns:

the Bayes instantiated model that is being updated.

calculatePriorMarginals

public double[] calculatePriorMarginals(int nodeIndex)

Specified by:

calculatePriorMarginals in interface BayesUpdater

calculateUpdatedMarginals

public double[] calculateUpdatedMarginals(int nodeIndex)

Specified by:

calculateUpdatedMarginals in interface BayesUpdater

toString

public String toString()

Overrides:

toString in class Object