edu.ksu.cis.bnj.bbn.learning
Class ScoreBasedLearner

java.lang.Object
  edu.ksu.cis.bnj.bbn.learning.Learner
      edu.ksu.cis.bnj.bbn.learning.ScoreBasedLearner

All Implemented Interfaces:

Optionable

Direct Known Subclasses:

BDEBasedLearner, ExhaustiveEval, GAWK, GreedySL, HillClimbingSL, SimAnnealSL

public abstract class ScoreBasedLearner

extends Learner

Score-based learning classes

Author:

Roby Joehanes

Field Summary

protected LearnerScore	candidateScorer
static int	defaultParentLimit
protected int	parentLimit Set the upper bound on parent limits.
protected LearnerScore	structureScorer

Fields inherited from class edu.ksu.cis.bnj.bbn.learning.Learner

bbnNodes, calculateCPT, data, indexTable, learnerClassName, OPT_CALCULATE_RMSE, options

Fields inherited from interface edu.ksu.cis.kdd.util.gui.Optionable

OPT_OUTPUT_FILE

Constructor Summary

ScoreBasedLearner()

ScoreBasedLearner(Data t)
Constructor for ScoreBasedLearning.

ScoreBasedLearner(Data t, LearnerScore s)
Constructor for ScoreBasedLearning.

ScoreBasedLearner(Data t, LearnerScore s, LearnerScore s2)
Constructor for ScoreBasedLearning.

Method Summary

protected void	computeCPT(BBNGraph g)
int	getParentLimit()
protected void	iterateUniqueInstantiation(int depth, int[] nodes, int[] valInts, java.util.Hashtable curQuery) Iterate through unique instantiation of children given parents.
void	setCandidateScorer(LearnerScore scorer) Sets the candidate scorer.
void	setParentLimit(int parentLimit) Sets the parentLimit.
void	setStructureScorer(LearnerScore structureScorer) Sets the structure scorer.
void	setTable(Table tuples)

Methods inherited from class edu.ksu.cis.bnj.bbn.learning.Learner

getCalculateRMSE, getCurrentOptions, getData, getDefaultOptions, getGraph, getName, getOptionsDialog, getOutputFile, initialize, isCalculateCPT, load, populateNodes, processParameters, setCalculateCPT, setCalculateRMSE, setData, setOption, setOptions, setOutputFile

Methods inherited from class java.lang.Object

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

Field Detail

defaultParentLimit

public static final int defaultParentLimit

See Also:

Constant Field Values

candidateScorer

protected LearnerScore candidateScorer

structureScorer

protected LearnerScore structureScorer

parentLimit

protected int parentLimit

Set the upper bound on parent limits. Defaults to 5

Constructor Detail

ScoreBasedLearner

public ScoreBasedLearner()

ScoreBasedLearner

public ScoreBasedLearner(Data t)

Constructor for ScoreBasedLearning.

Parameters:

t -

ScoreBasedLearner

public ScoreBasedLearner(Data t,
                         LearnerScore s)

Constructor for ScoreBasedLearning.

Parameters:

t -

ScoreBasedLearner

public ScoreBasedLearner(Data t,
                         LearnerScore s,
                         LearnerScore s2)

Constructor for ScoreBasedLearning.

Parameters:

t -

Method Detail

setCandidateScorer

public void setCandidateScorer(LearnerScore scorer)

Sets the candidate scorer.

setStructureScorer

public void setStructureScorer(LearnerScore structureScorer)

Sets the structure scorer.

Parameters:

structureScorer - The structureScorer to set

setTable

public void setTable(Table tuples)

getParentLimit

public int getParentLimit()

Returns:

int

setParentLimit

public void setParentLimit(int parentLimit)

Sets the parentLimit.

Parameters:

parentLimit - The parentLimit to set

computeCPT

protected void computeCPT(BBNGraph g)

iterateUniqueInstantiation

protected void iterateUniqueInstantiation(int depth,
                                          int[] nodes,
                                          int[] valInts,
                                          java.util.Hashtable curQuery)

Iterate through unique instantiation of children given parents. To invoke: iterateUniqueInstantiation(nodeList, new Hashtable(), tallyer);

Parameters:

nodes - List of BBNNodes being iterated. The last one must be child node