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

Class GridBasedReferencePoints<V extends NumberVector<?>>

java.lang.Object

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

Type Parameters:

V - Object type

All Implemented Interfaces:

InspectionUtilFrequentlyScanned, Parameterizable, ReferencePointsHeuristic<V>

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

Grid-based strategy to pick reference points.

Nested Class Summary

Nested Classes

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

Field Summary

Fields

Modifier and Type	Field and Description
static OptionID	GRID_ID Parameter to specify the grid resolution.
static OptionID	GRID_SCALE_ID Parameter to specify the extra scaling of the space, to allow out-of-data-space reference points.
protected int	gridres Holds the value of GRID_ID.
protected double	gridscale Holds the value of GRID_SCALE_ID.

Constructor Summary

Constructors

Constructor and Description
GridBasedReferencePoints(int gridres, double gridscale) 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

GRID_ID

public static final OptionID GRID_ID

Parameter to specify the grid resolution.

Key: -grid.size

GRID_SCALE_ID

public static final OptionID GRID_SCALE_ID

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

Key: -grid.oversize

gridres

protected int gridres

Holds the value of GRID_ID.

gridscale

protected double gridscale

Holds the value of GRID_SCALE_ID.

Constructor Detail

GridBasedReferencePoints

public GridBasedReferencePoints(int gridres,
                        double gridscale)

Constructor.

Parameters:

gridres - Grid resolution

gridscale - Grid scaling

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.