edu.cmu.minorthird.classify.algorithms.random
Class Arithmetic

java.lang.Object
  edu.cmu.minorthird.classify.algorithms.random.Constants
      edu.cmu.minorthird.classify.algorithms.random.Arithmetic

public class Arithmetic
extends Constants

Field Summary

protected static double[]	doubleFactorials
protected static double[]	logFactorials
protected static long[]	longFactorials

Fields inherited from class edu.cmu.minorthird.classify.algorithms.random.Constants

big, biginv, LOGPI, MACHEP, MAXGAM, MAXLOG, MINLOG, SQRTH, SQTPI

Constructor Summary

protected

Arithmetic()

Method Summary

static double	binomial(double n, long k)
static double	binomial(long n, long k)
static long	ceil(double value)
static double	chbevl(double x, double[] coef, int N)
static double	factorial(int k)
static long	floor(double value)
static double	log(double base, double value)
static double	log10(double value)
static double	log2(double value)
static double	logFactorial(int k)
static double	logGamma(double x) Returns the log of Gamma(double x), using Algorithm 291.
static long	longFactorial(int k)
static double	stirlingCorrection(int k)

Methods inherited from class java.lang.Object

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

Field Detail

logFactorials

protected static final double[] logFactorials

longFactorials

protected static final long[] longFactorials

doubleFactorials

protected static final double[] doubleFactorials

Constructor Detail

Arithmetic

protected Arithmetic()

Method Detail

binomial

public static double binomial(double n,
                              long k)

binomial

public static double binomial(long n,
                              long k)

ceil

public static long ceil(double value)

chbevl

public static double chbevl(double x,
                            double[] coef,
                            int N)
                     throws java.lang.ArithmeticException

Throws:

java.lang.ArithmeticException

factorial

public static double factorial(int k)

floor

public static long floor(double value)

log

public static double log(double base,
                         double value)

log10

public static double log10(double value)

log2

public static double log2(double value)

logFactorial

public static double logFactorial(int k)

longFactorial

public static long longFactorial(int k)
                          throws java.lang.IllegalArgumentException

Throws:

java.lang.IllegalArgumentException

stirlingCorrection

public static double stirlingCorrection(int k)

logGamma

public static double logGamma(double x)

Returns the log of Gamma(double x), using Algorithm 291. Pike and Hill (1966) Uses StirlingCorrection for (double) x >= 7.