de.lmu.ifi.dbs.elki.distance.distancefunction

Class SharedNearestNeighborJaccardDistanceFunction<O>

java.lang.Object

de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractDatabaseDistanceFunction<O,D>

de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractIndexBasedDistanceFunction<O,SharedNearestNeighborIndex<O>,DoubleDistance>

de.lmu.ifi.dbs.elki.distance.distancefunction.SharedNearestNeighborJaccardDistanceFunction<O>

Type Parameters:

O - object type

All Implemented Interfaces:

DistanceFunction<O,DoubleDistance>, IndexBasedDistanceFunction<O,DoubleDistance>, InspectionUtilFrequentlyScanned, Parameterizable

public class SharedNearestNeighborJaccardDistanceFunction<O>
extends AbstractIndexBasedDistanceFunction<O,SharedNearestNeighborIndex<O>,DoubleDistance>

SharedNearestNeighborJaccardDistanceFunction computes the Jaccard coefficient, which is a proper distance metric.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SharedNearestNeighborJaccardDistanceFunction.Instance<T> Actual instance for a dataset.
static class	SharedNearestNeighborJaccardDistanceFunction.Parameterizer<O> Parameterization class.

Field Summary

Fields inherited from class de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractIndexBasedDistanceFunction

indexFactory

Fields inherited from interface de.lmu.ifi.dbs.elki.distance.distancefunction.IndexBasedDistanceFunction

INDEX_ID

Constructor Summary

Constructors

Constructor and Description
SharedNearestNeighborJaccardDistanceFunction(SharedNearestNeighborIndex.Factory<O,SharedNearestNeighborIndex<O>> indexFactory) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
DoubleDistance	getDistanceFactory() Method to get the distance functions factory.
<T extends O> SharedNearestNeighborJaccardDistanceFunction.Instance<T>	instantiate(Relation<T> database) Instantiate with a database to get the actual distance query.

Methods inherited from class de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractIndexBasedDistanceFunction

getInputTypeRestriction, isMetric, isSymmetric

Methods inherited from class java.lang.Object

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

Constructor Detail

SharedNearestNeighborJaccardDistanceFunction

public SharedNearestNeighborJaccardDistanceFunction(SharedNearestNeighborIndex.Factory<O,SharedNearestNeighborIndex<O>> indexFactory)

Constructor.

Parameters:

indexFactory - Index factory.

Method Detail

instantiate

public <T extends O> SharedNearestNeighborJaccardDistanceFunction.Instance<T> instantiate(Relation<T> database)

Description copied from interface: DistanceFunction

Instantiate with a database to get the actual distance query.

Parameters:

database - The representation to use

Returns:

Actual distance query.

getDistanceFactory

public DoubleDistance getDistanceFactory()

Description copied from interface: DistanceFunction

Method to get the distance functions factory.

Specified by:

getDistanceFactory in interface DistanceFunction<O,DoubleDistance>

Specified by:

getDistanceFactory in class AbstractDatabaseDistanceFunction<O,DoubleDistance>

Returns:

Factory for distance objects