de.lmu.ifi.dbs.elki.algorithm

Class MaterializeDistances<O,D extends NumberDistance<D,?>>

java.lang.Object

de.lmu.ifi.dbs.elki.algorithm.AbstractAlgorithm<R>

de.lmu.ifi.dbs.elki.algorithm.AbstractDistanceBasedAlgorithm<O,D,CollectionResult<CTriple<DBID,DBID,Double>>>

de.lmu.ifi.dbs.elki.algorithm.MaterializeDistances<O,D>

Type Parameters:

O - Object type

D - Distance type

All Implemented Interfaces:

Algorithm, Parameterizable

@Title(value="MaterializeDistances")
@Description(value="Materialize all distances in the data set to use as cached/precalculated data.")
public class MaterializeDistances<O,D extends NumberDistance<D,?>>
extends AbstractDistanceBasedAlgorithm<O,D,CollectionResult<CTriple<DBID,DBID,Double>>>

Algorithm to materialize all the distances in a data set. The result can then be used with the DoubleDistanceParser and MultipleFileInput to use cached distances. Symmetry is assumed.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MaterializeDistances.Parameterizer<O,D extends NumberDistance<D,?>> Parameterization class.

Field Summary

Fields

Modifier and Type	Field and Description
private static Logging	LOG The logger for this class.

Fields inherited from class de.lmu.ifi.dbs.elki.algorithm.AbstractDistanceBasedAlgorithm

DISTANCE_FUNCTION_ID

Constructor Summary

Constructors

Constructor and Description
MaterializeDistances(DistanceFunction<? super O,D> distanceFunction) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
TypeInformation[]	getInputTypeRestriction() Get the input type restriction used for negotiating the data query.
protected Logging	getLogger() Get the (STATIC) logger for this class.
CollectionResult<CTriple<DBID,DBID,Double>>	run(Database database, Relation<O> relation) Iterates over all points in the database.

Methods inherited from class de.lmu.ifi.dbs.elki.algorithm.AbstractDistanceBasedAlgorithm

getDistanceFunction

Methods inherited from class de.lmu.ifi.dbs.elki.algorithm.AbstractAlgorithm

makeParameterDistanceFunction, run

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final Logging LOG

The logger for this class.

Constructor Detail

MaterializeDistances

public MaterializeDistances(DistanceFunction<? super O,D> distanceFunction)

Constructor.

Parameters:

distanceFunction - Parameterization

Method Detail

run

public CollectionResult<CTriple<DBID,DBID,Double>> run(Database database,
                                              Relation<O> relation)

Iterates over all points in the database.

Parameters:

database - Database to process

relation - Relation to process

Returns:

Distance matrix

getLogger

protected Logging getLogger()

Description copied from class: AbstractAlgorithm

Get the (STATIC) logger for this class.

Specified by:

getLogger in class AbstractAlgorithm<CollectionResult<CTriple<DBID,DBID,Double>>>

Returns:

the static logger

getInputTypeRestriction

public TypeInformation[] getInputTypeRestriction()

Description copied from class: AbstractAlgorithm

Get the input type restriction used for negotiating the data query.

Specified by:

getInputTypeRestriction in interface Algorithm

Specified by:

getInputTypeRestriction in class AbstractAlgorithm<CollectionResult<CTriple<DBID,DBID,Double>>>

Returns:

Type restriction