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

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

Type Parameters:

O - Object type

All Implemented Interfaces:

Parameterizable, ReferencePointsHeuristic<O>

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

Grid-based strategy to pick reference points.

Author:

Erich Schubert

Field Summary

static OptionID	GRID_ID OptionID for GRID_PARAM
private IntParameter	GRID_PARAM Parameter to specify the grid resolution.
static OptionID	GRID_SCALE_ID OptionID for GRID_SCALE_PARAM
private DoubleParameter	GRID_SCALE_PARAM 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_PARAM.
protected double	gridscale Holds the value of GRID_SCALE_PARAM.

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

debug, logger

Constructor Summary

GridBasedReferencePoints(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

GRID_ID

public static final OptionID GRID_ID

OptionID for GRID_PARAM

GRID_PARAM

private final IntParameter GRID_PARAM

Parameter to specify the grid resolution.

Key: -grid.size

GRID_SCALE_ID

public static final OptionID GRID_SCALE_ID

OptionID for GRID_SCALE_PARAM

GRID_SCALE_PARAM

private final DoubleParameter GRID_SCALE_PARAM

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_PARAM.

gridscale

protected double gridscale

Holds the value of GRID_SCALE_PARAM.

Constructor Detail

GridBasedReferencePoints

public GridBasedReferencePoints(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.