ur_rna.Utilities

Class MathUtil

java.lang.Object

ur_rna.Utilities.MathUtil

public class MathUtil
extends java.lang.Object

Extended math functions.

Constructor Summary

Constructors

Constructor and Description
MathUtil()

Method Summary

Modifier and Type	Method and Description
static double	log2(double value) Returns the base 2 logarithm of a number.
static int	log2i(double value) Returns the smallest integer x such that 2^x is greater than or equal to the specified value.
static double	pow2(double value) Returns the smallest power of 2 greater than or equal to the specified value.
static int	pow2i(double value) Returns the smallest power of 2 greater than or equal to the specified value.
static long	pow2L(double value) Returns the smallest power of 2 greater than or equal to the specified value.

Methods inherited from class java.lang.Object

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

Constructor Detail

MathUtil

public MathUtil()

Method Detail

log2

public static double log2(double value)

Returns the base 2 logarithm of a number. i.e. log(value)/log(2)

log2i

public static int log2i(double value)

Returns the smallest integer x such that 2^x is greater than or equal to the specified value. e.g. Pow2(37) returns 6 (because 2^6 is the smallest power of two greater than or equal to 37)

Parameters:

value -

Returns:

An integer that represents the exponent of the smallest power of two that is greater than or equal to the specified value.

pow2

public static double pow2(double value)

Returns the smallest power of 2 greater than or equal to the specified value. e.g. Pow2(37) returns 64 because 32 < 37 <= 64

pow2i

public static int pow2i(double value)

Returns the smallest power of 2 greater than or equal to the specified value. e.g. Pow2(37) returns 64, which is the smallest power of 2 greater than or equal to 37. Note: If the return value might exceed the range of an integer, then pow2L(double) or pow2(double) should be used instead.

pow2L

public static long pow2L(double value)

Returns the smallest power of 2 greater than or equal to the specified value. e.g. Pow2(37) returns 64, which is the smallest power of 2 greater than or equal to 37.