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

java.lang.Object
  de.lmu.ifi.dbs.elki.logging.AbstractLoggable
      de.lmu.ifi.dbs.elki.utilities.referencepoints.RandomSampleReferencePoints<O>

Type Parameters:

O - Vector type

All Implemented Interfaces:

Parameterizable, ReferencePointsHeuristic<O>

public class RandomSampleReferencePoints<O extends NumberVector<O,?>>
extends AbstractLoggable
implements ReferencePointsHeuristic<O>

Random-Sampling strategy for picking reference points.

Author:

Erich Schubert

Field Summary

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

Fields inherited from class de.lmu.ifi.dbs.elki.logging.AbstractLoggable

debug, logger

Constructor Summary

RandomSampleReferencePoints(Parameterization config)
Constructor, adhering to Parameterizable

Method Summary

Collection<O>

getReferencePoints(Database<O> db) Get the reference points for the given database.

Methods inherited from class de.lmu.ifi.dbs.elki.logging.AbstractLoggable

debugFine, debugFiner, debugFinest, exception, progress, verbose, warning

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

OptionID for N_PARAM

log4

private static final double log4

Constant used in choosing optimal table sizes

N_PARAM

private final IntParameter N_PARAM

Parameter to specify the sample size.

Key: -sample.n

samplesize

private int samplesize

Holds the value of N_PARAM.

Constructor Detail

RandomSampleReferencePoints

public RandomSampleReferencePoints(Parameterization config)

Constructor, adhering to Parameterizable

Parameters:

config - Parameterization

Method Detail

getReferencePoints

public Collection<O> getReferencePoints(Database<O> db)

Description copied from interface: ReferencePointsHeuristic

Get the reference points for the given database.

Specified by:

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

Parameters:

db - Database

Returns:

Collection of reference points.