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

Class AbstractSimilarityAdapter.Instance<O>

java.lang.Object

de.lmu.ifi.dbs.elki.database.query.distance.AbstractDistanceQuery<O>

de.lmu.ifi.dbs.elki.database.query.distance.AbstractDatabaseDistanceQuery<O>

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

de.lmu.ifi.dbs.elki.distance.distancefunction.adapter.AbstractSimilarityAdapter.Instance<O>

Type Parameters:

O - Object type

All Implemented Interfaces:

DatabaseQuery, DistanceQuery<O>

Direct Known Subclasses:

ArccosSimilarityAdapter.Instance, LinearAdapterLinear.Instance, LnSimilarityAdapter.Instance

Enclosing class:

AbstractSimilarityAdapter<O>

public abstract static class AbstractSimilarityAdapter.Instance<O>
extends AbstractDatabaseDistanceFunction.Instance<O>

Inner proxy class for SNN distance function.

Author:

Erich Schubert

Field Summary

Fields

Modifier and Type	Field and Description
private SimilarityQuery<? super O>	similarityQuery The similarity query we use.

Fields inherited from class de.lmu.ifi.dbs.elki.database.query.distance.AbstractDistanceQuery

relation

Fields inherited from interface de.lmu.ifi.dbs.elki.database.query.DatabaseQuery

HINT_BULK, HINT_EXACT, HINT_HEAVY_USE, HINT_NO_CACHE, HINT_OPTIMIZED_ONLY, HINT_SINGLE

Constructor Summary

Constructors

Constructor and Description
Instance(Relation<O> database, DistanceFunction<? super O> parent, SimilarityQuery<? super O> similarityQuery) Constructor.

Method Summary

Modifier and Type	Method and Description
double	distance(DBIDRef id1, DBIDRef id2) Returns the distance between the two objects specified by their object ids.
abstract double	transform(double similarity) Transformation function.

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

getDistanceFunction

Methods inherited from class de.lmu.ifi.dbs.elki.database.query.distance.AbstractDatabaseDistanceQuery

distance, distance, distance

Methods inherited from class de.lmu.ifi.dbs.elki.database.query.distance.AbstractDistanceQuery

getRelation

Methods inherited from class java.lang.Object

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

Field Detail

similarityQuery

private SimilarityQuery<? super O> similarityQuery

The similarity query we use.

Constructor Detail

Instance

public Instance(Relation<O> database,
                DistanceFunction<? super O> parent,
                SimilarityQuery<? super O> similarityQuery)

Constructor.

Parameters:

database - Database to use

parent - Parent distance function

similarityQuery - Similarity query

Method Detail

transform

public abstract double transform(double similarity)

Transformation function.

Parameters:

similarity - Similarity value

Returns:

Distance value

distance

public double distance(DBIDRef id1,
                       DBIDRef id2)

Description copied from class: AbstractDistanceQuery

Returns the distance between the two objects specified by their object ids.

Specified by:

distance in interface DistanceQuery<O>

Specified by:

distance in class AbstractDistanceQuery<O>

Parameters:

id1 - first object id

id2 - second object id

Returns:

the distance between the two objects specified by their object ids