jebl.math
Class MachineAccuracy

java.lang.Object
  jebl.math.MachineAccuracy

public class MachineAccuracy
extends Object

determines machine accuracy

Author:

Korbinian Strimmer, Alexei Drummond

Field Summary

static double	EPSILON machine accuracy constant
static double	SQRT_EPSILON
static double	SQRT_SQRT_EPSILON

Constructor Summary

MachineAccuracy()

Method Summary

static double	computeEpsilon() compute EPSILON from scratch
static boolean	same(double a, double b)

Methods inherited from class java.lang.Object

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

Field Detail

EPSILON

public static double EPSILON

machine accuracy constant

SQRT_EPSILON

public static double SQRT_EPSILON

SQRT_SQRT_EPSILON

public static double SQRT_SQRT_EPSILON

Constructor Detail

MachineAccuracy

public MachineAccuracy()

Method Detail

computeEpsilon

public static double computeEpsilon()

compute EPSILON from scratch

same

public static boolean same(double a,
                           double b)

Returns:

true if the relative difference between the two parameters is smaller than SQRT_EPSILON.