de.viadee.discretizers4j.impl

Class AmevaDiscretizer

java.lang.Object

de.viadee.discretizers4j.AbstractDiscretizer

de.viadee.discretizers4j.AbstractSupervisedDiscretizer

de.viadee.discretizers4j.impl.AmevaDiscretizer

All Implemented Interfaces:

Discretizer, Serializable, Function<Serializable,Double>

public class AmevaDiscretizer
extends AbstractSupervisedDiscretizer

Implementation of the Ameva discretization algorithm described by [Gonzales-Abril, Cuberos, Velasco, Ortega 2009]

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
AmevaDiscretizer() Constructs the Ameva Discretizer, Ameva works without any Parameters.

Method Summary

Modifier and Type	Method and Description
protected List<DiscretizationTransition>	fitCreateTransitions(List<AbstractMap.SimpleImmutableEntry<Double,Double>> keyValuePairs) Implementation of Ameva, 1. sort values and get all CutPoints, 2.

Methods inherited from class de.viadee.discretizers4j.AbstractSupervisedDiscretizer

equalClassSplit, fitCreateTransitions

Methods inherited from class de.viadee.discretizers4j.AbstractDiscretizer

apply, fit, fit, getDiscretizationTransitionsFromCutPoints, getTransitions

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.viadee.discretizers4j.Discretizer

apply, getTransition

Methods inherited from interface java.util.function.Function

andThen, compose, identity

Constructor Detail

AmevaDiscretizer

public AmevaDiscretizer()

Constructs the Ameva Discretizer, Ameva works without any Parameters.

Method Detail

fitCreateTransitions

protected List<DiscretizationTransition> fitCreateTransitions(List<AbstractMap.SimpleImmutableEntry<Double,Double>> keyValuePairs)

Implementation of Ameva, 1. sort values and get all CutPoints, 2. Consecutively add new cut points and determine Ameva value (variation of contingency coefficient) of the tentative cut points. Get best cut point of this iteration. If the ameva value does not increase with new cut points break and return Discretization

Specified by:

fitCreateTransitions in class AbstractSupervisedDiscretizer

Parameters:

keyValuePairs - List of Values and Labels

Returns:

list of DiscretizationTransition determined to have the highest Ameva value