weka.associations

Class DefaultAssociationRule

java.lang.Object

weka.associations.AssociationRule

weka.associations.DefaultAssociationRule

All Implemented Interfaces:

Serializable, Comparable<AssociationRule>

public class DefaultAssociationRule
extends AssociationRule
implements Serializable

Class for storing and manipulating an association rule.

Author:

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

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DefaultAssociationRule.METRIC_TYPE Enum for holding different metric types

Field Summary

Fields

Modifier and Type	Field and Description
static Tag[]	TAGS_SELECTION Tags for display in the GUI

Constructor Summary

Constructors

Constructor and Description
DefaultAssociationRule(Collection<Item> premise, Collection<Item> consequence, DefaultAssociationRule.METRIC_TYPE metric, int premiseSupport, int consequenceSupport, int totalSupport, int totalTransactions) Construct a new default association rule.

Method Summary

Modifier and Type	Method and Description
Collection<Item>	getConsequence() Get the consequence of this rule.
int	getConsequenceSupport() Get the support for the consequence.
String[]	getMetricNamesForRule() Return the names of the metrics available for this rule.
double[]	getMetricValuesForRule() Get all the available metric values for this rule.
double	getNamedMetricValue(String metricName) Get the value of the named metric for this rule
int	getNumberOfMetricsForRule() Gets the number of metrics available for this rule.
Collection<Item>	getPremise() Get the premise of this rule.
int	getPremiseSupport() Get the support for the premise.
String	getPrimaryMetricName() Get the name of the primary metric of this rule (e.g.
double	getPrimaryMetricValue() Get the value of the metric for this rule.
int	getTotalSupport() Get the total support for this rule (premise + consequence).
int	getTotalTransactions() Get the total number of transactions in the data.
String	toString() Get a textual description of this rule.

Methods inherited from class weka.associations.AssociationRule

compareTo, containsItems, equals

Methods inherited from class java.lang.Object

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

Field Detail

TAGS_SELECTION

public static final Tag[] TAGS_SELECTION

Tags for display in the GUI

Constructor Detail

DefaultAssociationRule

public DefaultAssociationRule(Collection<Item> premise,
                              Collection<Item> consequence,
                              DefaultAssociationRule.METRIC_TYPE metric,
                              int premiseSupport,
                              int consequenceSupport,
                              int totalSupport,
                              int totalTransactions)

Construct a new default association rule.

Parameters:

premise - the premise of the rule

consequence - the consequence of the rule

metric - the metric for the rule

premiseSupport - the support of the premise

consequenceSupport - the support of the consequence

totalSupport - the total support of the rule

totalTransactions - the number of transactions in the data

Method Detail

getPremise

public Collection<Item> getPremise()

Description copied from class: AssociationRule

Get the premise of this rule.

Specified by:

getPremise in class AssociationRule

Returns:

the premise of this rule.

getConsequence

public Collection<Item> getConsequence()

Description copied from class: AssociationRule

Get the consequence of this rule.

Specified by:

getConsequence in class AssociationRule

Returns:

the consequence of this rule.

getPrimaryMetricName

public String getPrimaryMetricName()

Description copied from class: AssociationRule

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

Specified by:

getPrimaryMetricName in class AssociationRule

Returns:

the name of the primary metric of this rule.

getPrimaryMetricValue

public double getPrimaryMetricValue()

Description copied from class: AssociationRule

Get the value of the metric for this rule.

Specified by:

getPrimaryMetricValue in class AssociationRule

Returns:

the value of the metric for this rule.

getNamedMetricValue

public double getNamedMetricValue(String metricName)
                           throws Exception

Description copied from class: AssociationRule

Get the value of the named metric for this rule

Specified by:

getNamedMetricValue in class AssociationRule

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 int getNumberOfMetricsForRule()

Description copied from class: AssociationRule

Gets the number of metrics available for this rule.

Specified by:

getNumberOfMetricsForRule in class AssociationRule

Returns:

the number of metrics available for this rule

getMetricNamesForRule

public String[] getMetricNamesForRule()

Description copied from class: AssociationRule

Return the names of the metrics available for this rule.

Specified by:

getMetricNamesForRule in class AssociationRule

Returns:

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

getMetricValuesForRule

public double[] getMetricValuesForRule()
                                throws Exception

Description copied from class: AssociationRule

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().

Specified by:

getMetricValuesForRule in class AssociationRule

Returns:

all the available metrics for this rule.

Throws:

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

getPremiseSupport

public int getPremiseSupport()

Description copied from class: AssociationRule

Get the support for the premise.

Specified by:

getPremiseSupport in class AssociationRule

Returns:

the support for the premise.

getConsequenceSupport

public int getConsequenceSupport()

Description copied from class: AssociationRule

Get the support for the consequence.

Specified by:

getConsequenceSupport in class AssociationRule

Returns:

the support for the consequence.

getTotalSupport

public int getTotalSupport()

Description copied from class: AssociationRule

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

Specified by:

getTotalSupport in class AssociationRule

Returns:

the total support for this rule.

getTotalTransactions

public int getTotalTransactions()

Description copied from class: AssociationRule

Get the total number of transactions in the data.

Specified by:

getTotalTransactions in class AssociationRule

Returns:

the total number of transactions in the data.

toString

public String toString()

Get a textual description of this rule.

Overrides:

toString in class Object

Returns:

a textual description of this rule.