de.lmu.ifi.dbs.elki.distance.distancefunction
Class LPNormDistanceFunction<V extends NumberVector<V,N>,N extends Number>

java.lang.Object
  de.lmu.ifi.dbs.elki.logging.AbstractLoggable
      de.lmu.ifi.dbs.elki.distance.AbstractMeasurementFunction<O,D>
          de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractDistanceFunction<V,DoubleDistance>
              de.lmu.ifi.dbs.elki.distance.distancefunction.LPNormDistanceFunction<V,N>

Type Parameters:

V - the type of FeatureVector to compute the distances in between

N - number type TODO: implement SpatialDistanceFunction

All Implemented Interfaces:

DistanceFunction<V,DoubleDistance>, MeasurementFunction<V,DoubleDistance>, Parameterizable

public class LPNormDistanceFunction<V extends NumberVector<V,N>,N extends Number>
extends AbstractDistanceFunction<V,DoubleDistance>

Provides a LP-Norm for FeatureVectors.

Author:

Arthur Zimek

Field Summary

private double	p Keeps the currently set p.
static OptionID	P_ID OptionID for P_PARAM
private DoubleParameter	P_PARAM P parameter

Fields inherited from class de.lmu.ifi.dbs.elki.distance.AbstractMeasurementFunction

distanceFactory

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

debug, logger

Constructor Summary

LPNormDistanceFunction(Parameterization config)
Constructor, adhering to Parameterizable

Method Summary

DoubleDistance

distance(V v1, V v2) Returns the distance between the specified FeatureVectors as a LP-Norm for the currently set p.

Methods inherited from class de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractDistanceFunction

distance, distance

Methods inherited from class de.lmu.ifi.dbs.elki.distance.AbstractMeasurementFunction

getDatabase, getDistanceFactory, infiniteDistance, nullDistance, setDatabase, undefinedDistance, valueOf

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

Methods inherited from interface de.lmu.ifi.dbs.elki.distance.MeasurementFunction

getDistanceFactory, infiniteDistance, nullDistance, setDatabase, undefinedDistance, valueOf

Field Detail

P_ID

public static final OptionID P_ID

OptionID for P_PARAM

P_PARAM

private final DoubleParameter P_PARAM

P parameter

p

private double p

Keeps the currently set p.

Constructor Detail

LPNormDistanceFunction

public LPNormDistanceFunction(Parameterization config)

Constructor, adhering to Parameterizable

Parameters:

config - Parameterization

Method Detail

distance

public DoubleDistance distance(V v1,
                               V v2)

Returns the distance between the specified FeatureVectors as a LP-Norm for the currently set p.

Parameters:

v1 - first FeatureVector

v2 - second FeatureVector

Returns:

the distance between the specified FeatureVectors as a LP-Norm for the currently set p