Package weka.classifiers.functions.pace

Class DiscreteFunction

  • All Implemented Interfaces:
    RevisionHandler
    public class DiscreteFunction
extends java.lang.Object
implements RevisionHandler
    Class for handling discrete functions.

    A discrete function here is one that takes non-zero values over a finite set of points.

    Version:
    $Revision: 1.4 $
    Author:
    Yong Wang (yongwang@cs.waikato.ac.nz)

    • Constructor Detail

      • DiscreteFunction

        public DiscreteFunction()
        Constructs an empty discrete function

      • DiscreteFunction

        public DiscreteFunction​(DoubleVector p)
        Constructs a discrete function with the point values provides and the function values are all 1/n.
        Parameters:
        p - the point values

      • DiscreteFunction

        public DiscreteFunction​(DoubleVector p,
                        DoubleVector v)
        Constructs a discrete function with both the point values and function values provided.
        Parameters:
        p - the point values
        v - the function values

    • Method Detail

      • normalize

        public DiscreteFunction normalize()
        Normalizes the function values with L1-norm.

      • sort

        public void sort()
        Sorts the point values of the discrete function.

      • clone

        public java.lang.Object clone()
        Clones the discrete function

      • unique

        public DiscreteFunction unique()
        Makes each individual point value unique

      • size

        public int size()
        Returns the size of the point set.

      • getPointValue

        public double getPointValue​(int i)
        Gets a particular point value
        Parameters:
        i - the index

      • getFunctionValue

        public double getFunctionValue​(int i)
        Gets a particular function value
        Parameters:
        i - the index

      • setPointValue

        public void setPointValue​(int i,
                          double p)
        Sets a particular point value
        Parameters:
        i - the index

      • setFunctionValue

        public void setFunctionValue​(int i,
                             double v)
        Sets a particular function value
        Parameters:
        i - the index

      • isEmpty

        public boolean isEmpty()
        Returns true if it is empty.

      • plus

        public DiscreteFunction plus​(DiscreteFunction d)
        Returns the combined of two discrete functions
        Parameters:
        d - the second discrete function
        Returns:
        the combined discrte function

      • plusEquals

        public DiscreteFunction plusEquals​(DiscreteFunction d)
        Returns the combined of two discrete functions. The first function is replaced with the new one.
        Parameters:
        d - the second discrete function
        Returns:
        the combined discrte function

      • timesEquals

        public DiscreteFunction timesEquals​(double x)
        All function values are multiplied by a double
        Parameters:
        x - the multiplier

      • toString

        public java.lang.String toString()
        Converts the discrete function to string.
        Overrides:
        toString in class java.lang.Object

      • getRevision

        public java.lang.String getRevision()
        Returns the revision string.
        Specified by:
        getRevision in interface RevisionHandler
        Returns:
        the revision

      • main

        public static void main​(java.lang.String[] args)