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

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<V,?>>
extends Object
implements ReferencePointsHeuristic<V>

Grid-based strategy to pick reference points.

Nested Class Summary

static class

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

Field Summary

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

GridBasedReferencePoints(int gridres, double gridscale)
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

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 -

gridscale -

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<V,?>>

Parameters:

db - Database

Returns:

Collection of reference points.