com.ibm.bluej.util.common

Class DenseVectors

java.lang.Object

com.ibm.bluej.util.common.DenseVectors

public class DenseVectors
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
DenseVectors()

Method Summary

Methods

Modifier and Type	Method and Description
static void	addTo(double[] v, double scalar)
static void	addTo(double[] v1, double[] v2)
static void	addTo(double[] v1, double[] v2, double scaleV2)
static double	cosine(double[] v1, double[] v2)
static double	dotProduct(double[] v1, double[] v2)
static double	euclidean(double[] v1, double[] v2)
static double[]	extend(double[] v1, double... add)
static double[]	fromSparse(java.util.Map<? extends java.lang.Comparable,java.lang.Double> sparse)
static double	gapFirstAndSecond(double[] v)
static boolean	hasNaN(double[] v)
static double	kendallTau(double[] x, double[] y)
static double	klDivergence(double[] v1, double[] v2)
static double	klDivergence(double[] v1, double[] v2, double smooth)
static int	maxIndex(double[] v)
static double	mean(double[] v)
static int	minIndex(double[] v)
static double	oneNorm(double[] v)
static double	pearsonsR(double[] x, double[] y)
static int	randomFromPdf(double[] pdf, java.util.Random rand)
static double[]	randomVector(int len)
static void	scale(double[] v, double s)
static void	scale(double[] v, double[] s)
static double	stdDev(double[] v, double m)
static double	sum(double[] v)
static java.lang.Double[]	toObjectArray(double[] v)
static double[]	toPrimativeArray(java.util.Collection<java.lang.Double> l)
static java.util.HashMap<java.lang.Integer,MutableDouble>	toSparse(double[] v)
static java.lang.String	toString(double[] v)
static java.lang.String	toString(double[] v, java.lang.String separator)
static java.lang.String	toString(int[] v)
static double	twoNorm(double[] v)

Methods inherited from class java.lang.Object

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

Constructor Detail

DenseVectors

public DenseVectors()

Method Detail

klDivergence

public static double klDivergence(double[] v1,
                  double[] v2)

klDivergence

public static double klDivergence(double[] v1,
                  double[] v2,
                  double smooth)

fromSparse

public static double[] fromSparse(java.util.Map<? extends java.lang.Comparable,java.lang.Double> sparse)

oneNorm

public static double oneNorm(double[] v)

twoNorm

public static double twoNorm(double[] v)

hasNaN

public static boolean hasNaN(double[] v)

sum

public static double sum(double[] v)

mean

public static double mean(double[] v)

maxIndex

public static int maxIndex(double[] v)

minIndex

public static int minIndex(double[] v)

stdDev

public static double stdDev(double[] v,
            double m)

toSparse

public static java.util.HashMap<java.lang.Integer,MutableDouble> toSparse(double[] v)

extend

public static double[] extend(double[] v1,
              double... add)

kendallTau

public static double kendallTau(double[] x,
                double[] y)

pearsonsR

public static double pearsonsR(double[] x,
               double[] y)

addTo

public static void addTo(double[] v,
         double scalar)

addTo

public static void addTo(double[] v1,
         double[] v2)

addTo

public static void addTo(double[] v1,
         double[] v2,
         double scaleV2)

scale

public static void scale(double[] v,
         double[] s)

scale

public static void scale(double[] v,
         double s)

euclidean

public static double euclidean(double[] v1,
               double[] v2)

cosine

public static double cosine(double[] v1,
            double[] v2)

dotProduct

public static double dotProduct(double[] v1,
                double[] v2)

toPrimativeArray

public static double[] toPrimativeArray(java.util.Collection<java.lang.Double> l)

randomVector

public static double[] randomVector(int len)

toString

public static java.lang.String toString(int[] v)

toObjectArray

public static java.lang.Double[] toObjectArray(double[] v)

toString

public static java.lang.String toString(double[] v,
                        java.lang.String separator)

toString

public static java.lang.String toString(double[] v)

randomFromPdf

public static int randomFromPdf(double[] pdf,
                java.util.Random rand)

gapFirstAndSecond

public static double gapFirstAndSecond(double[] v)