org.apache.commons.math3.util
Class FastMathLiteralArrays

java.lang.Object
  org.apache.commons.math3.util.FastMathLiteralArrays

 class FastMathLiteralArrays
extends Object

Utility class for loading tabulated data used by FastMath.

Version:

$Id: FastMathLiteralArrays.java 1364389 2012-07-22 18:19:26Z tn $

Field Summary

private static double[]	EXP_FRAC_A Exponential over the range of 0 - 1 in increments of 2^-10 exp(x/1024) = expFracTableA[x] + expFracTableB[x].
private static double[]	EXP_FRAC_B Exponential over the range of 0 - 1 in increments of 2^-10 exp(x/1024) = expFracTableA[x] + expFracTableB[x].
private static double[]	EXP_INT_A Exponential evaluated at integer values, exp(x) = expIntTableA[x + EXP_INT_TABLE_MAX_INDEX] + expIntTableB[x+EXP_INT_TABLE_MAX_INDEX].
private static double[]	EXP_INT_B Exponential evaluated at integer values, exp(x) = expIntTableA[x + EXP_INT_TABLE_MAX_INDEX] + expIntTableB[x+EXP_INT_TABLE_MAX_INDEX]
private static double[][]	LN_MANT Extended precision logarithm table over the range 1 - 2 in increments of 2^-10.

Constructor Summary

private

FastMathLiteralArrays() Class contains only static methods.

Method Summary

(package private) static double[]	loadExpFracA() Load "EXP_FRAC_A".
(package private) static double[]	loadExpFracB() Load "EXP_FRAC_B".
(package private) static double[]	loadExpIntA() Load "EXP_INT_A".
(package private) static double[]	loadExpIntB() Load "EXP_INT_B".
(package private) static double[][]	loadLnMant() Load "LN_MANT".

Methods inherited from class java.lang.Object

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

Field Detail

EXP_INT_A

private static final double[] EXP_INT_A

Exponential evaluated at integer values, exp(x) = expIntTableA[x + EXP_INT_TABLE_MAX_INDEX] + expIntTableB[x+EXP_INT_TABLE_MAX_INDEX].

EXP_INT_B

private static final double[] EXP_INT_B

Exponential evaluated at integer values, exp(x) = expIntTableA[x + EXP_INT_TABLE_MAX_INDEX] + expIntTableB[x+EXP_INT_TABLE_MAX_INDEX]

EXP_FRAC_A

private static final double[] EXP_FRAC_A

Exponential over the range of 0 - 1 in increments of 2^-10 exp(x/1024) = expFracTableA[x] + expFracTableB[x]. 1024 = 2^10

EXP_FRAC_B

private static final double[] EXP_FRAC_B

Exponential over the range of 0 - 1 in increments of 2^-10 exp(x/1024) = expFracTableA[x] + expFracTableB[x].

LN_MANT

private static final double[][] LN_MANT

Extended precision logarithm table over the range 1 - 2 in increments of 2^-10.

Constructor Detail

FastMathLiteralArrays

private FastMathLiteralArrays()

Class contains only static methods.

Method Detail

loadExpIntA

static double[] loadExpIntA()

Load "EXP_INT_A".

Returns:

a clone of the data array.

loadExpIntB

static double[] loadExpIntB()

Load "EXP_INT_B".

Returns:

a clone of the data array.

loadExpFracA

static double[] loadExpFracA()

Load "EXP_FRAC_A".

Returns:

a clone of the data array.

loadExpFracB

static double[] loadExpFracB()

Load "EXP_FRAC_B".

Returns:

a clone of the data array.

loadLnMant

static double[][] loadLnMant()

Load "LN_MANT".

Returns:

a clone of the data array.