keel.Algorithms.Preprocess.Missing_Values.BPCA

Class MachineAccuracy

java.lang.Object

keel.Algorithms.Preprocess.Missing_Values.BPCA.MachineAccuracy

public class MachineAccuracy
extends java.lang.Object

determines machine accuracy

Version:

$Id: MachineAccuracy.java,v 1.1 2010-07-03 22:51:28 keel Exp $

Author:

Korbinian Strimmer, Alexei Drummond

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor and Description
MachineAccuracy()

Method Summary

Modifier and Type	Method and Description
static double	computeEpsilon() Compute EPSILON from scratch
static boolean	same(double a, double b) Checks if the two numbers given are the same within a certain threshold.

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 Machine accuracy constant

SQRT_SQRT_EPSILON

public static double SQRT_SQRT_EPSILON

SQRT SQRT Machine accuracy constant

Constructor Detail

MachineAccuracy

public MachineAccuracy()

Method Detail

computeEpsilon

public static double computeEpsilon()

Compute EPSILON from scratch

Returns:

EPSILON from scratch

same

public static boolean same(double a,
                           double b)

Checks if the two numbers given are the same within a certain threshold.

Parameters:

a - first number to compare.

b - second number to compare.

Returns:

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