de.viadee.discretizers4j

Interface Discretizer

All Superinterfaces:

Function<Serializable,Double>, Serializable

All Known Implementing Classes:

AbstractDiscretizer, AbstractSupervisedDiscretizer, AmevaDiscretizer, EqualSizeDiscretizer, FUSINTERDiscretizer, ManualDiscretizer, MDLPDiscretizer, PercentileMedianDiscretizer, RandomDiscretizer, UniqueValueDiscretizer

public interface Discretizer
extends Function<Serializable,Double>, Serializable

Represents functionality every column needs to provide: discretization.

Discretization is used by Anchors tabular to perturb instances and find similar neighbours.

This interface supports both unsupervised and supervised discretizers. In supervised cases, labels are passed to fit(Serializable[], Double[])

Method Summary

Modifier and Type	Method and Description
default Double[]	apply(Serializable[] data) Applies this discretizer to the passed data
void	fit(Serializable[] values, Double[] labels) Fits the discretizer and passes all values that it might get asked to discretize
default DiscretizationTransition	getTransition(Double discretizedValue) This method returns the relation for a certain discretized value.
Collection<DiscretizationTransition>	getTransitions() This method returns all stored transitions

Methods inherited from interface java.util.function.Function

andThen, apply, compose, identity

Method Detail

apply

default Double[] apply(Serializable[] data)

Applies this discretizer to the passed data

Parameters:

data - the data to discretize

Returns:

the discretized data

fit

void fit(Serializable[] values,
         Double[] labels)

Fits the discretizer and passes all values that it might get asked to discretize

Parameters:

values - the domain

labels - the labels or null, iff unsupervised. Caution: labels are required to be discretized first

getTransition

default DiscretizationTransition getTransition(Double discretizedValue)

This method returns the relation for a certain discretized value.

This allows to unApply a discretization and obtain the original value

Parameters:

discretizedValue - the value to get the relation for

Returns:

the DiscretizationTransition

getTransitions

Collection<DiscretizationTransition> getTransitions()

This method returns all stored transitions

Returns:

the DiscretizationTransitions