com.datumbox.framework.core.mathematics.distances

Class Distance

java.lang.Object

com.datumbox.framework.core.mathematics.distances.Distance

public class Distance
extends java.lang.Object

The Distance class provides methods to estimate various types of distances between Associative Arrays.

Constructor Summary

Constructors

Constructor and Description
Distance()

Method Summary

Modifier and Type	Method and Description
static double	euclidean(AssociativeArray a1, AssociativeArray a2) Estimates the euclidean distance of two Associative Arrays.
static double	euclideanWeighted(AssociativeArray a1, AssociativeArray a2, java.util.Map<java.lang.Object,java.lang.Double> columnWeights) Estimates the weighted euclidean distance of two Associative Arrays.
static double	manhattan(AssociativeArray a1, AssociativeArray a2) Estimates the manhattan distance of two Associative Arrays.
static double	manhattanWeighted(AssociativeArray a1, AssociativeArray a2, java.util.Map<java.lang.Object,java.lang.Double> columnWeights) Estimates the weighted manhattan distance of two Associative Arrays.
static double	maximum(AssociativeArray a1, AssociativeArray a2) Estimates the maximum distance of two Associative Arrays.

Methods inherited from class java.lang.Object

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

Constructor Detail

Distance

public Distance()

Method Detail

euclidean

public static double euclidean(AssociativeArray a1,
                               AssociativeArray a2)

Estimates the euclidean distance of two Associative Arrays.

Parameters:

a1 -

a2 -

Returns:

euclideanWeighted

public static double euclideanWeighted(AssociativeArray a1,
                                       AssociativeArray a2,
                                       java.util.Map<java.lang.Object,java.lang.Double> columnWeights)

Estimates the weighted euclidean distance of two Associative Arrays.

Parameters:

a1 -

a2 -

columnWeights -

Returns:

manhattan

public static double manhattan(AssociativeArray a1,
                               AssociativeArray a2)

Estimates the manhattan distance of two Associative Arrays.

Parameters:

a1 -

a2 -

Returns:

manhattanWeighted

public static double manhattanWeighted(AssociativeArray a1,
                                       AssociativeArray a2,
                                       java.util.Map<java.lang.Object,java.lang.Double> columnWeights)

Estimates the weighted manhattan distance of two Associative Arrays.

Parameters:

a1 -

a2 -

columnWeights -

Returns:

maximum

public static double maximum(AssociativeArray a1,
                             AssociativeArray a2)

Estimates the maximum distance of two Associative Arrays.

Parameters:

a1 -

a2 -

Returns: