Package net.sf.tweety.commons.util

Class 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 Description
      VectorTools()  

    • Method Summary

      Modifier and Type Method 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

        equals, 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 - some vector
        right - some vector
        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 - some vector
        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 - some vector
        right - some vector
        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 - some vector
        right - some vector
        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 - some vector
        sum - some vector
        Returns:
        the normalized array