org.apache.commons.math3.util
Class FastMathLiteralArrays

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

 class FastMathLiteralArrays
extends java.lang.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.


Copyright (c) 2003-2013 Apache Software Foundation