de.lmu.ifi.dbs.elki.utilities.referencepoints
Class RandomSampleReferencePoints<V extends NumberVector<? extends V,?>>

java.lang.Object
  de.lmu.ifi.dbs.elki.utilities.referencepoints.RandomSampleReferencePoints<V>

Type Parameters:

V - Vector type

All Implemented Interfaces:

InspectionUtilFrequentlyScanned, Parameterizable, ReferencePointsHeuristic<V>

public class RandomSampleReferencePoints<V extends NumberVector<? extends V,?>>
extends Object
implements ReferencePointsHeuristic<V>

Random-Sampling strategy for picking reference points.

Nested Class Summary

static class

RandomSampleReferencePoints.Parameterizer<V extends NumberVector<? extends V,?>> Parameterization class.

Field Summary

private static double	log4 Constant used in choosing optimal table sizes
static OptionID	N_ID Parameter to specify the sample size.
private int	samplesize Holds the value of N_ID.

Constructor Summary

RandomSampleReferencePoints(int samplesize)
Constructor.

Method Summary

<T extends V> Collection<V>

getReferencePoints(Relation<T> db) Get the reference points for the given database.

Methods inherited from class java.lang.Object

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

Field Detail

N_ID

public static final OptionID N_ID

Parameter to specify the sample size.

Key: -sample.n

log4

private static final double log4

Constant used in choosing optimal table sizes

samplesize

private int samplesize

Holds the value of N_ID.

Constructor Detail

RandomSampleReferencePoints

public RandomSampleReferencePoints(int samplesize)

Constructor.

Parameters:

samplesize -

Method Detail

getReferencePoints

public <T extends V> Collection<V> getReferencePoints(Relation<T> db)

Description copied from interface: ReferencePointsHeuristic

Get the reference points for the given database.

Specified by:

getReferencePoints in interface ReferencePointsHeuristic<V extends NumberVector<? extends V,?>>

Parameters:

db - Database

Returns:

Collection of reference points.