org.encog.mathutil
Class BoundMath

java.lang.Object
  extended by 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
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.


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