org.encog.mathutil

Class BoundMath

java.lang.Object

org.encog.mathutil.BoundMath

public final class BoundMath
extends Object

Java will sometimes return Math.NaN or Math.Infinity when numbers get to large or too small. This can have undesirable effects. This class provides some basic math functions that may be in danger of returning such a value. This class imposes a very large and small ceiling and floor to keep the numbers within range.

Author:

jheaton

Method Summary

Methods

Modifier and Type	Method and Description
static double	cos(double a) Calculate the cos.
static double	exp(double a) Calculate the exp.
static double	log(double a) Calculate the log.
static double	pow(double a, double b) Calculate the power of a number.
static double	sin(double a) Calculate the sin.
static double	sqrt(double a) Calculate the square root.
static double	tanh(double d) Calculate TANH, within bounds.

Methods inherited from class java.lang.Object

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

Method Detail

cos

public static double cos(double a)

Calculate the cos.

Parameters:

a - The value passed to the function.

Returns:

The result of the function.

exp

public static double exp(double a)

Calculate the exp.

Parameters:

a - The value passed to the function.

Returns:

The result of the function.

log

public static double log(double a)

Calculate the log.

Parameters:

a - The value passed to the function.

Returns:

The result of the function.

pow

public static double pow(double a,
         double b)

Calculate the power of a number.

Parameters:

a - The base.

b - The exponent.

Returns:

The result of the function.

sin

public static double sin(double a)

Calculate the sin.

Parameters:

a - The value passed to the function.

Returns:

The result of the function.

sqrt

public static double sqrt(double a)

Calculate the square root.

Parameters:

a - The value passed to the function.

Returns:

The result of the function.

tanh

public static double tanh(double d)

Calculate TANH, within bounds.

Parameters:

d - The value to calculate for.

Returns:

The result.