weka.associations
Class AssociationRule

java.lang.Object
  weka.associations.AssociationRule

All Implemented Interfaces:

Comparable<AssociationRule>

Direct Known Subclasses:

DefaultAssociationRule

public abstract class AssociationRule
extends Object
implements Comparable<AssociationRule>

Abstract class for storing and manipulating an association rule.

Version:

$Revision: 8034 $

Author:

Mark Hall (mhall{[at]}pentaho{[dot]}com).

Constructor Summary

AssociationRule()

Method Summary

int	compareTo(AssociationRule other) Compare this rule to the supplied rule.
boolean	containsItems(ArrayList<Item> items, boolean useOr)
boolean	equals(Object other) Return true if this rule is equal to the supplied one.
abstract Collection<Item>	getConsequence() Get the consequence of this rule.
abstract int	getConsequenceSupport() Get the support for the consequence.
abstract String[]	getMetricNamesForRule() Return the names of the metrics available for this rule.
abstract double[]	getMetricValuesForRule() Get all the available metric values for this rule.
abstract double	getNamedMetricValue(String metricName) Get the value of the named metric for this rule
abstract int	getNumberOfMetricsForRule() Gets the number of metrics available for this rule.
abstract Collection<Item>	getPremise() Get the premise of this rule.
abstract int	getPremiseSupport() Get the support for the premise.
abstract String	getPrimaryMetricName() Get the name of the primary metric of this rule (e.g.
abstract double	getPrimaryMetricValue() Get the value of the metric for this rule.
abstract int	getTotalSupport() Get the total support for this rule (premise + consequence).
abstract int	getTotalTransactions() Get the total number of transactions in the data.

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AssociationRule

public AssociationRule()

Method Detail

getPremise

public abstract Collection<Item> getPremise()

Get the premise of this rule.

Returns:

the premise of this rule.

getConsequence

public abstract Collection<Item> getConsequence()

Get the consequence of this rule.

Returns:

the consequence of this rule.

getPrimaryMetricName

public abstract String getPrimaryMetricName()

Get the name of the primary metric of this rule (e.g. confidence).

Returns:

the name of the primary metric of this rule.

getPrimaryMetricValue

public abstract double getPrimaryMetricValue()

Get the value of the metric for this rule.

Returns:

the value of the metric for this rule.

getNamedMetricValue

public abstract double getNamedMetricValue(String metricName)
                                    throws Exception

Get the value of the named metric for this rule

Parameters:

metricName - the metric to get the value for

Returns:

the value of the named metric

Throws:

Exception - if the requested metric is unknown for this rule

getNumberOfMetricsForRule

public abstract int getNumberOfMetricsForRule()

Gets the number of metrics available for this rule.

Returns:

the number of metrics available for this rule

getMetricNamesForRule

public abstract String[] getMetricNamesForRule()

Return the names of the metrics available for this rule.

Returns:

the names of the metrics that are available for this rule.

getMetricValuesForRule

public abstract double[] getMetricValuesForRule()
                                         throws Exception

Get all the available metric values for this rule. Values are returned in an array with entries that correspond to the metric names returned by getMetricNamesForRule().

Returns:

all the available metrics for this rule.

Throws:

Exception - if a metric can't be computed for some reason.

getPremiseSupport

public abstract int getPremiseSupport()

Get the support for the premise.

Returns:

the support for the premise.

getConsequenceSupport

public abstract int getConsequenceSupport()

Get the support for the consequence.

Returns:

the support for the consequence.

getTotalSupport

public abstract int getTotalSupport()

Get the total support for this rule (premise + consequence).

Returns:

the total support for this rule.

getTotalTransactions

public abstract int getTotalTransactions()

Get the total number of transactions in the data.

Returns:

the total number of transactions in the data.

compareTo

public int compareTo(AssociationRule other)

Compare this rule to the supplied rule.

Specified by:

compareTo in interface Comparable<AssociationRule>

Parameters:

other - the rule to compare to.

Returns:

the result of the comparison.

equals

public boolean equals(Object other)

Return true if this rule is equal to the supplied one.

Overrides:

equals in class Object

Returns:

true if this rule is the same as the supplied rule.

containsItems

public boolean containsItems(ArrayList<Item> items,
                             boolean useOr)