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

Class LocalSubspaceDistanceFunction

java.lang.Object

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

de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractIndexBasedDistanceFunction<NumberVector<?>,FilteredLocalPCAIndex<NumberVector<?>>,SubspaceDistance>

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

All Implemented Interfaces:

DistanceFunction<NumberVector<?>,SubspaceDistance>, FilteredLocalPCABasedDistanceFunction<NumberVector<?>,FilteredLocalPCAIndex<NumberVector<?>>,SubspaceDistance>, IndexBasedDistanceFunction<NumberVector<?>,SubspaceDistance>, Parameterizable

public class LocalSubspaceDistanceFunction
extends AbstractIndexBasedDistanceFunction<NumberVector<?>,FilteredLocalPCAIndex<NumberVector<?>>,SubspaceDistance>
implements FilteredLocalPCABasedDistanceFunction<NumberVector<?>,FilteredLocalPCAIndex<NumberVector<?>>,SubspaceDistance>

Provides a distance function to determine a kind of correlation distance between two points, which is a pair consisting of the distance between the two subspaces spanned by the strong eigenvectors of the two points and the affine distance between the two subspaces.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	LocalSubspaceDistanceFunction.Instance<V extends NumberVector<?>> The actual instance bound to a particular database.
static class	LocalSubspaceDistanceFunction.Parameterizer 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
LocalSubspaceDistanceFunction(IndexFactory<NumberVector<?>,FilteredLocalPCAIndex<NumberVector<?>>> indexFactory) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
SubspaceDistance	getDistanceFactory() Method to get the distance functions factory.
<V extends NumberVector<?>> LocalSubspaceDistanceFunction.Instance<V>	instantiate(Relation<V> 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

Methods inherited from interface de.lmu.ifi.dbs.elki.distance.distancefunction.DistanceFunction

getInputTypeRestriction, isMetric, isSymmetric

Constructor Detail

LocalSubspaceDistanceFunction

public LocalSubspaceDistanceFunction(IndexFactory<NumberVector<?>,FilteredLocalPCAIndex<NumberVector<?>>> indexFactory)

Constructor

Parameters:

indexFactory - Index factory

Method Detail

getDistanceFactory

public SubspaceDistance getDistanceFactory()

Description copied from interface: DistanceFunction

Method to get the distance functions factory.

Specified by:

getDistanceFactory in interface DistanceFunction<NumberVector<?>,SubspaceDistance>

Specified by:

getDistanceFactory in class AbstractDatabaseDistanceFunction<NumberVector<?>,SubspaceDistance>

Returns:

Factory for distance objects

instantiate

public <V extends NumberVector<?>> LocalSubspaceDistanceFunction.Instance<V> instantiate(Relation<V> database)

Description copied from interface: FilteredLocalPCABasedDistanceFunction

Instantiate with a database to get the actual distance query.

Specified by:

instantiate in interface DistanceFunction<NumberVector<?>,SubspaceDistance>

Specified by:

instantiate in interface FilteredLocalPCABasedDistanceFunction<NumberVector<?>,FilteredLocalPCAIndex<NumberVector<?>>,SubspaceDistance>

Parameters:

database - The representation to use

Returns:

Actual distance query.