jebl.math

Class MachineAccuracy

java.lang.Object

jebl.math.MachineAccuracy

public class MachineAccuracy
extends java.lang.Object

determines machine accuracy

Version:

$Id: MachineAccuracy.java 914 2008-05-22 05:14:44Z twobeers $

Author:

Korbinian Strimmer, Alexei Drummond

Field Summary

Fields

Modifier and Type	Field and Description
static double	EPSILON machine accuracy constant
static double	SQRT_EPSILON
static double	SQRT_SQRT_EPSILON

Constructor Summary

Constructors

Constructor and Description
MachineAccuracy()

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	same(double a, double b)

Methods inherited from class java.lang.Object

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

Field Detail

EPSILON

public static final double EPSILON

machine accuracy constant

See Also:

Constant Field Values

SQRT_EPSILON

public static final double SQRT_EPSILON

See Also:

Constant Field Values

SQRT_SQRT_EPSILON

public static final double SQRT_SQRT_EPSILON

See Also:

Constant Field Values

Constructor Detail

MachineAccuracy

public MachineAccuracy()

Method Detail

same

public static boolean same(double a,
           double b)

Returns:

true if the relative difference between the two parameters is no larger than SQRT_EPSILON. (TT: I think this means (b / (1+SQRT_EPSILON)) <= a <= b * (1+SQRT_EPSILON) )