Package elki.distance

Class WeightedCanberraDistance

java.lang.Object

elki.distance.AbstractNumberVectorDistance

elki.distance.WeightedCanberraDistance

All Implemented Interfaces:

Distance<NumberVector>, NumberVectorDistance<NumberVector>, PrimitiveDistance<NumberVector>, SpatialPrimitiveDistance<NumberVector>, WeightedNumberVectorDistance<NumberVector>

public class WeightedCanberraDistance
extends AbstractNumberVectorDistance
implements SpatialPrimitiveDistance<NumberVector>, WeightedNumberVectorDistance<NumberVector>

Weighted Canberra distance function, a variation of Manhattan distance.

Since:

0.5.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	WeightedCanberraDistance.Par	Parameterization class.

Field Summary

Fields

Modifier and Type	Field	Description
protected double[]	weights	Weight array

Fields inherited from interface elki.distance.WeightedNumberVectorDistance

WEIGHTS_ID

Constructor Summary

Constructors

Constructor	Description
WeightedCanberraDistance(double[] weights)	Constructor.

Method Summary

Modifier and Type	Method	Description
double	distance(NumberVector v1, NumberVector v2)	Computes the distance between two given DatabaseObjects according to this distance function.
boolean	isMetric()	Is this distance function metric (satisfy the triangle inequality)
double	minDist(SpatialComparable mbr1, SpatialComparable mbr2)	Computes the distance between the two given MBRs according to this distance function.

Methods inherited from class elki.distance.AbstractNumberVectorDistance

dimensionality, dimensionality, dimensionality, dimensionality, dimensionality, dimensionality, dimensionality, dimensionality, getInputTypeRestriction

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface elki.distance.Distance

isSquared, isSymmetric

Methods inherited from interface elki.distance.PrimitiveDistance

getInputTypeRestriction

Methods inherited from interface elki.distance.SpatialPrimitiveDistance

instantiate

Field Detail

weights

protected double[] weights

Weight array

Constructor Detail

WeightedCanberraDistance

public WeightedCanberraDistance(double[] weights)

Constructor.

Method Detail

distance

public double distance(NumberVector v1,
                       NumberVector v2)

Description copied from interface: PrimitiveDistance

Computes the distance between two given DatabaseObjects according to this distance function.

Specified by:

distance in interface NumberVectorDistance<NumberVector>

Specified by:

distance in interface PrimitiveDistance<NumberVector>

Parameters:

v1 - first DatabaseObject

v2 - second DatabaseObject

Returns:

the distance between two given DatabaseObjects according to this distance function

minDist

public double minDist(SpatialComparable mbr1,
                      SpatialComparable mbr2)

Description copied from interface: SpatialPrimitiveDistance

Computes the distance between the two given MBRs according to this distance function.

Specified by:

minDist in interface SpatialPrimitiveDistance<NumberVector>

Parameters:

mbr1 - the first MBR object

mbr2 - the second MBR object

Returns:

the distance between the two given MBRs according to this distance function

isMetric

public boolean isMetric()

Description copied from interface: Distance

Is this distance function metric (satisfy the triangle inequality)

Specified by:

isMetric in interface Distance<NumberVector>

Returns:

true when metric.