weka.classifiers.meta.ensembleSelection

Class EnsembleMetricHelper

java.lang.Object

weka.classifiers.meta.ensembleSelection.EnsembleMetricHelper

All Implemented Interfaces:

weka.core.RevisionHandler

public class EnsembleMetricHelper
extends java.lang.Object
implements weka.core.RevisionHandler

This class is used by Ensemble Selection. It provides the "enumeration" of the metrics that can be used by ensemble selection, as well as a helper function for computing the metric using an Evaluation class.

Version:

$Revision: 8108 $

Author:

David Michael

Field Summary

Fields

Modifier and Type	Field and Description
static int	METRIC_ACCURACY metric: Accuracy
static int	METRIC_ALL metric: All
static int	METRIC_FSCORE metric: FScore
static int	METRIC_PRECISION metric: Precision
static int	METRIC_RECALL metric: Recall
static int	METRIC_RMSE metric: RMSE
static int	METRIC_ROC metric: ROC

Constructor Summary

Constructors

Constructor and Description
EnsembleMetricHelper()

Method Summary

Modifier and Type	Method and Description
static double	getMetric(weka.classifiers.Evaluation eval, int metric_index) Given an Evaluation object and metric, call the appropriate function to get the value for that metric and return it.
java.lang.String	getRevision() Returns the revision string.

Methods inherited from class java.lang.Object

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

Field Detail

METRIC_ACCURACY

public static final int METRIC_ACCURACY

metric: Accuracy

See Also:

Constant Field Values

METRIC_RMSE

public static final int METRIC_RMSE

metric: RMSE

See Also:

Constant Field Values

METRIC_ROC

public static final int METRIC_ROC

metric: ROC

See Also:

Constant Field Values

METRIC_PRECISION

public static final int METRIC_PRECISION

metric: Precision

See Also:

Constant Field Values

METRIC_RECALL

public static final int METRIC_RECALL

metric: Recall

See Also:

Constant Field Values

METRIC_FSCORE

public static final int METRIC_FSCORE

metric: FScore

See Also:

Constant Field Values

METRIC_ALL

public static final int METRIC_ALL

metric: All

See Also:

Constant Field Values

Constructor Detail

EnsembleMetricHelper

public EnsembleMetricHelper()

Method Detail

getMetric

public static double getMetric(weka.classifiers.Evaluation eval,
                               int metric_index)

Given an Evaluation object and metric, call the appropriate function to get the value for that metric and return it. Metrics are returned so that "bigger is better". For instance, we return 1.0 - RMSE instead of RMSE, because bigger RMSE is better.

Parameters:

eval - the evaluation object to use

metric_index - the metric to use

Returns:

the value for the metric

getRevision

public java.lang.String getRevision()

Returns the revision string.

Specified by:

getRevision in interface weka.core.RevisionHandler

Returns:

the revision