dragon.util

Class MathUtil

java.lang.Object

dragon.util.MathUtil

public class MathUtil
extends Object

Math related utilities

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Field Summary

Fields

Modifier and Type	Field and Description
static double	LOG0
static double	LOG2

Constructor Summary

Constructors

Constructor and Description
MathUtil()

Method Summary

Modifier and Type	Method and Description
static double	average(double[] array)
static double	average(int[] array)
static void	copyArray(double[] srcArray, double[] destArray)
static double	exp(double d)
static void	initArray(double[] array, double initVal)
static void	initArray(int[] array, int initVal)
static double	log(double val)
static double	logSumExp(double[] logArray)
static void	logSumExp(double[] v1, double[] v2)
static double	logSumExp(double v1, double v2)
static double	max(double[] array)
static int	max(int[] array)
static int	maxElementInArray(double[] array)
static int	maxElementInArray(int[] array)
static double	min(double[] array)
static int	min(int[] array)
static void	multiArray(double[] array, double multiplier)
static int[]	rankElementInArray(double[] array, boolean desc)
static int[]	rankElementInArray(int[] array, boolean desc)
static double	sumArray(double[] array)
static void	sumArray(double[] array, double[] incArray)
static int	sumArray(int[] array)

Methods inherited from class java.lang.Object

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

Field Detail

LOG0

public static double LOG0

LOG2

public static double LOG2

Constructor Detail

MathUtil

public MathUtil()

Method Detail

initArray

public static void initArray(double[] array,
                             double initVal)

initArray

public static void initArray(int[] array,
                             int initVal)

copyArray

public static void copyArray(double[] srcArray,
                             double[] destArray)

multiArray

public static void multiArray(double[] array,
                              double multiplier)

sumArray

public static double sumArray(double[] array)

sumArray

public static int sumArray(int[] array)

sumArray

public static void sumArray(double[] array,
                            double[] incArray)

max

public static double max(double[] array)

max

public static int max(int[] array)

min

public static double min(double[] array)

min

public static int min(int[] array)

average

public static double average(double[] array)

average

public static double average(int[] array)

maxElementInArray

public static int maxElementInArray(double[] array)

maxElementInArray

public static int maxElementInArray(int[] array)

rankElementInArray

public static int[] rankElementInArray(double[] array,
                                       boolean desc)

rankElementInArray

public static int[] rankElementInArray(int[] array,
                                       boolean desc)

exp

public static double exp(double d)

log

public static double log(double val)

logSumExp

public static double logSumExp(double v1,
                               double v2)

logSumExp

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

logSumExp

public static double logSumExp(double[] logArray)