de.lmu.ifi.dbs.elki.utilities.referencepoints

Class StarBasedReferencePoints<V extends NumberVector<?>>

java.lang.Object

de.lmu.ifi.dbs.elki.utilities.referencepoints.StarBasedReferencePoints<V>

Type Parameters:

V - Object type

All Implemented Interfaces:

InspectionUtilFrequentlyScanned, Parameterizable, ReferencePointsHeuristic<V>

public class StarBasedReferencePoints<V extends NumberVector<?>>
extends Object
implements ReferencePointsHeuristic<V>

Star-based strategy to pick reference points.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StarBasedReferencePoints.Parameterizer<V extends NumberVector<?>> Parameterization class.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	nocenter Holds the value of NOCENTER_ID.
static OptionID	NOCENTER_ID Parameter to specify the grid resolution.
protected double	scale Holds the value of SCALE_ID.
static OptionID	SCALE_ID Parameter to specify the extra scaling of the space, to allow out-of-data-space reference points.

Constructor Summary

Constructors

Constructor and Description
StarBasedReferencePoints(boolean nocenter, double scale) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
<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

NOCENTER_ID

public static final OptionID NOCENTER_ID

Parameter to specify the grid resolution.

Key: -star.nocenter

SCALE_ID

public static final OptionID SCALE_ID

Parameter to specify the extra scaling of the space, to allow out-of-data-space reference points.

Key: -star.scale

nocenter

protected boolean nocenter

Holds the value of NOCENTER_ID.

scale

protected double scale

Holds the value of SCALE_ID.

Constructor Detail

StarBasedReferencePoints

public StarBasedReferencePoints(boolean nocenter,
                        double scale)

Constructor.

Parameters:

nocenter - Do not include center point

scale - Scaling factor

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<?>>

Parameters:

db - Database

Returns:

Collection of reference points.