net.sf.tweety.commons.util

Class VectorTools

java.lang.Object

net.sf.tweety.commons.util.VectorTools

public class VectorTools
extends java.lang.Object

This class contains some auxiliary methods for working with vectors.

Author:

Matthias Thimm

Constructor Summary

Constructors

Constructor and Description
VectorTools()

Method Summary

Modifier and Type	Method and Description
static double	manhattanDistance(double[] left, double[] right) Computes the Manhattan distance between the two given vectors.
static double	manhattanDistance(java.util.List<java.lang.Double> left, java.util.List<java.lang.Double> right) Computes the Manhattan distance between the two given lists.
static double	manhattanDistanceToZero(double[] values) Computes the Manhattan distance of the given value vector to zero
static double	manhattanDistanceToZero(java.util.List<java.lang.Double> values) Computes the Manhattan distance of the given value vector to zero
static double[]	midPoint(double[] left, double[] right) Computes the midpoint of the two given vectors.
static double[]	normalize(double[] v, double sum) Normalizes the given vector such that the sum of the elements equals "sum"
static double	sum(double[] v) Computes the sum of the elements in v

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorTools

public VectorTools()

Method Detail

midPoint

public static double[] midPoint(double[] left,
                                double[] right)

Computes the midpoint of the two given vectors.

Parameters:

left -

right -

Returns:

the midpoint of the two given vectors.

sum

public static double sum(double[] v)

Computes the sum of the elements in v

Parameters:

v -

Returns:

the sum of the elements in v

manhattanDistance

public static double manhattanDistance(double[] left,
                                       double[] right)

Computes the Manhattan distance between the two given vectors.

Parameters:

left -

right -

Returns:

the Manhattan distance between the two given vectors.

manhattanDistance

public static double manhattanDistance(java.util.List<java.lang.Double> left,
                                       java.util.List<java.lang.Double> right)

Computes the Manhattan distance between the two given lists.

Parameters:

left -

right -

Returns:

the Manhattan distance between the two given lists.

manhattanDistanceToZero

public static double manhattanDistanceToZero(java.util.List<java.lang.Double> values)

Computes the Manhattan distance of the given value vector to zero

Parameters:

values - a list of doubles.

Returns:

the distance to zero

manhattanDistanceToZero

public static double manhattanDistanceToZero(double[] values)

Computes the Manhattan distance of the given value vector to zero

Parameters:

values - a list of doubles.

Returns:

the distance to zero

normalize

public static double[] normalize(double[] v,
                                 double sum)

Normalizes the given vector such that the sum of the elements equals "sum"

Parameters:

v -

sum -

Returns:

the normalized array