aima.util
Class Util

java.lang.Object
  aima.util.Util

public class Util
extends java.lang.Object

Field Summary

static java.lang.String	NO
static java.lang.String	YES

Constructor Summary

Util()

Method Summary

static double	calculateMean(java.util.List<java.lang.Double> lst)
static double	calculateStDev(java.util.List<java.lang.Double> values, double mean)
static void	checkForNanOrInfinity(double d)
static <T> T	first(java.util.List<T> l)
static double	generateRandomDoubleBetween(double lowerLimit, double upperLimit)
static double	information(double[] probabilities)
static double	log2(double d)
static int	max(int i, int j)
static int	max(int i, int j, int k)
static int	min(int i, int j)
static int	min(int i, int j, int k)
static <T> T	mode(java.util.List<T> l)
static double[]	normalize(double[] probDist)
static java.util.List<java.lang.Double>	normalize(java.util.List<java.lang.Double> values)
static java.util.List<java.lang.Double>	normalizeFromMeanAndStdev(java.util.List<java.lang.Double> values, double mean, double stdev)
static java.lang.String	ntimes(java.lang.String s, int n)
static boolean	randomBoolean()
static int	randomNumberBetween(int i, int j)
static <T> java.util.List<T>	removeFrom(java.util.List<T> list, T member)
static <T> java.util.List<T>	rest(java.util.List<T> l)
static <T> T	selectRandomlyFromList(java.util.List<T> l)
static <T extends java.lang.Number> double	sumOfSquares(java.util.List<T> list)
static java.lang.String[]	yesno()

Methods inherited from class java.lang.Object

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

Field Detail

NO

public static final java.lang.String NO

See Also:

Constant Field Values

YES

public static final java.lang.String YES

See Also:

Constant Field Values

Constructor Detail

Util

public Util()

Method Detail

first

public static <T> T first(java.util.List<T> l)

rest

public static <T> java.util.List<T> rest(java.util.List<T> l)

randomBoolean

public static boolean randomBoolean()

normalize

public static double[] normalize(double[] probDist)

normalize

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

min

public static int min(int i,
                      int j)

max

public static int max(int i,
                      int j)

max

public static int max(int i,
                      int j,
                      int k)

min

public static int min(int i,
                      int j,
                      int k)

selectRandomlyFromList

public static <T> T selectRandomlyFromList(java.util.List<T> l)

mode

public static <T> T mode(java.util.List<T> l)

yesno

public static java.lang.String[] yesno()

log2

public static double log2(double d)

information

public static double information(double[] probabilities)

removeFrom

public static <T> java.util.List<T> removeFrom(java.util.List<T> list,
                                               T member)

sumOfSquares

public static <T extends java.lang.Number> double sumOfSquares(java.util.List<T> list)

ntimes

public static java.lang.String ntimes(java.lang.String s,
                                      int n)

checkForNanOrInfinity

public static void checkForNanOrInfinity(double d)

randomNumberBetween

public static int randomNumberBetween(int i,
                                      int j)

calculateMean

public static double calculateMean(java.util.List<java.lang.Double> lst)

calculateStDev

public static double calculateStDev(java.util.List<java.lang.Double> values,
                                    double mean)

normalizeFromMeanAndStdev

public static java.util.List<java.lang.Double> normalizeFromMeanAndStdev(java.util.List<java.lang.Double> values,
                                                                         double mean,
                                                                         double stdev)

generateRandomDoubleBetween

public static double generateRandomDoubleBetween(double lowerLimit,
                                                 double upperLimit)