org.gvsig.utils

Class MathExtension

java.lang.Object

org.gvsig.utils.MathExtension

public final class MathExtension
extends java.lang.Object

Some more mathematical functions that 'java.lang.Math' doesn't have: - Logarithm operations: log2, log2Integer, logX, logXInteger

Constructor Summary

Constructors

Constructor and Description
MathExtension()

Method Summary

Modifier and Type	Method and Description
static double	log2(double a) 2-base logarithm of a
static int	log2Integer(double a) 2-base logarithm of a, but the result doesn't have decimals (approximated to the integer number most near by below)
static double	logX(double x_base, double a) X-base logarithm of a
static int	logXInteger(double x_base, double a) X-base logarithm of a, but the result doesn't have decimals (approximated to the integer number most near by below)

Methods inherited from class java.lang.Object

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

Constructor Detail

MathExtension

public MathExtension()

Method Detail

log2

public static double log2(double a)

2-base logarithm of a

Parameters:

a - The value to do the calculations

Returns:

Logarithm in 2 base of 'a'

log2Integer

public static int log2Integer(double a)

2-base logarithm of a, but the result doesn't have decimals (approximated to the integer number most near by below)

Parameters:

a - The value to do the calculations

Returns:

Logarithm in 2 base of 'a', as an integer

logX

public static double logX(double x_base,
                          double a)

X-base logarithm of a

Parameters:

a - The value to do the calculations

Returns:

Logarithm in X base of 'a'

logXInteger

public static int logXInteger(double x_base,
                              double a)

X-base logarithm of a, but the result doesn't have decimals (approximated to the integer number most near by below)

Parameters:

a - The value to do the calculations

Returns:

Logarithm in X base of 'a', as an integer