Package adaa.analytics.rules.logic.performance

Class SimpleCriterion

java.lang.Object

adaa.analytics.rules.logic.performance.AbstractPerformanceCounter

adaa.analytics.rules.logic.performance.SimpleCriterion

public class SimpleCriterion
extends AbstractPerformanceCounter

Simple criteria are those which error can be counted for each example and can be averaged by the number of examples. Since errors should be minimized, the fitness is calculated as -1 multiplied by the the error. Subclasses might also want to implement the method transform(double) which applies a transformation on the value sum divided by the number of counted examples. This is for example usefull in case of root_means_squared error. All subclasses can be used for both regression and classification problems. In case of classification the confidence value for the desired true label is used as prediction.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ABSOLUTE_ERROR
static final int	LENIENT_RELATIVE_ERROR
static final int	RELATIVE_ERROR
static final int	ROOT_MEAN_SQUARED_ERROR
static final int	SQUARED_ERROR
static final int	STRICT_RELATIVE_ERROR

Constructor Summary

Constructors

Constructor	Description
SimpleCriterion(int type)

Method Summary

Modifier and Type	Method	Description
protected double	countExample(double label, double predictedLabel)	Subclasses must count the example and return the value to sum up.
PerformanceResult	countExample(IExampleSet eset)	Counts a single example, e.g.
protected double	transform(double value)	Simply returns the given value.

Methods inherited from class java.lang.Object

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

Field Details

ABSOLUTE_ERROR

public static final int ABSOLUTE_ERROR

See Also:

• Constant Field Values

LENIENT_RELATIVE_ERROR

public static final int LENIENT_RELATIVE_ERROR

See Also:

• Constant Field Values

RELATIVE_ERROR

public static final int RELATIVE_ERROR

See Also:

• Constant Field Values

ROOT_MEAN_SQUARED_ERROR

public static final int ROOT_MEAN_SQUARED_ERROR

See Also:

• Constant Field Values

SQUARED_ERROR

public static final int SQUARED_ERROR

See Also:

• Constant Field Values

STRICT_RELATIVE_ERROR

public static final int STRICT_RELATIVE_ERROR

See Also:

• Constant Field Values

Constructor Details

SimpleCriterion

public SimpleCriterion(int type)

Method Details

countExample

protected double countExample(double label,
 double predictedLabel)

Subclasses must count the example and return the value to sum up.

transform

protected double transform(double value)

Simply returns the given value. Subclasses might apply a transformation on the error sum divided by the number of examples.

countExample

public PerformanceResult countExample(IExampleSet eset)

Description copied from class: AbstractPerformanceCounter

Counts a single example, e.g. by summing up errors.

Specified by:

countExample in class AbstractPerformanceCounter