org.mariuszgromada.math.mxparser.mathcollection

Class BinaryRelations

java.lang.Object

org.mariuszgromada.math.mxparser.mathcollection.BinaryRelations

public final class BinaryRelations
extends Object

BinaryRelations - class for dealing with binary relations on integers or doubles.

Version:

4.1.0

Author:

Mariusz Gromada
mariuszgromada.org@gmail.com
MathSpace.pl
MathParser.org - mXparser project page
mXparser on GitHub
mXparser on SourceForge
mXparser on Bitbucket
mXparser on CodePlex
Janet Sudoku - project web page
Janet Sudoku on GitHub
Janet Sudoku on CodePlex
Janet Sudoku on SourceForge
Janet Sudoku on BitBucket

Field Summary

Fields

Modifier and Type	Field and Description
static double	DEFAULT_COMPARISON_EPSILON Default epsilon for comparison

Constructor Summary

Constructors

Constructor and Description
BinaryRelations()

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	checkIfEpsilonMode() Checks if epsilon comparison mode is active;
static boolean	checkIfExactMode() Checks if exact comparison mode is active;
static double	eq(double a, double b) Equality relation.
static double	geq(double a, double b) Greater or equal relation.
static double	getEpsilon() Returns current epsilon value.
static double	gt(double a, double b) Greater than relation.
static double	leq(double a, double b) Lower or equal relation.
static double	lt(double a, double b) Lower than relation.
static double	neq(double a, double b) Inequality relation.
static void	setDefaultEpsilon() Sets default epsilon value.
static void	setEpsilon(double epsilon) Sets epsilon value.
static void	setEpsilonComparison() Sets comparison mode to EPSILON.
static void	setExactComparison() Sets comparison mode to EXACT.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_COMPARISON_EPSILON

public static final double DEFAULT_COMPARISON_EPSILON

Default epsilon for comparison

See Also:

Constant Field Values

Constructor Detail

BinaryRelations

public BinaryRelations()

Method Detail

setExactComparison

public static final void setExactComparison()

Sets comparison mode to EXACT.

setEpsilonComparison

public static final void setEpsilonComparison()

Sets comparison mode to EPSILON.

setEpsilon

public static final void setEpsilon(double epsilon)

Sets epsilon value.

Parameters:

epsilon - Epsilon value (grater than 0).

See Also:

setEpsilonComparison()

setDefaultEpsilon

public static final void setDefaultEpsilon()

Sets default epsilon value.

See Also:

setEpsilonComparison(), DEFAULT_COMPARISON_EPSILON

getEpsilon

public static final double getEpsilon()

Returns current epsilon value.

Returns:

Returns current epsilon value.

See Also:

setEpsilonComparison()

checkIfEpsilonMode

public static final boolean checkIfEpsilonMode()

Checks if epsilon comparison mode is active;

Returns:

True if epsilon mode is active, otherwise returns false.

See Also:

setEpsilonComparison(), setExactComparison()

checkIfExactMode

public static final boolean checkIfExactMode()

Checks if exact comparison mode is active;

Returns:

True if exact mode is active, otherwise returns false.

See Also:

setEpsilonComparison(), setExactComparison()

eq

public static final double eq(double a,
        double b)

Equality relation.

Parameters:

a - the a number (a = b)

b - the b number (a = b)

Returns:

if a = Double.NaN or b = Double.NaN return Double.NaN, else if a = b return 1, otherwise return 0.

neq

public static final double neq(double a,
         double b)

Inequality relation.

Parameters:

a - the a number (a <> b)

b - the b number (a <> b)

Returns:

if a = Double.NaN or b = Double.NaN return Double.NaN, else if a <> b return 1, otherwise return 0.

lt

public static final double lt(double a,
        double b)

Lower than relation.

Parameters:

a - the a number (a < b)

b - the b number (a < b)

Returns:

if a = Double.NaN or b = Double.NaN return Double.NaN, else if a < b return 1, otherwise return 0.

gt

public static final double gt(double a,
        double b)

Greater than relation.

Parameters:

a - the a number (a > b)

b - the b number (a > b)

Returns:

if a = Double.NaN or b = Double.NaN return Double.NaN, else if a > b return 1, otherwise return 0.

leq

public static final double leq(double a,
         double b)

Lower or equal relation.

Parameters:

a - the a number (a <= b)

b - the b number (a <= b)

Returns:

if a = Double.NaN or b = Double.NaN return Double.NaN, else if a <= b return 1, otherwise return 0.

geq

public static final double geq(double a,
         double b)

Greater or equal relation.

Parameters:

a - the a number (a >= b)

b - the b number (a >= b)

Returns:

if a = Double.NaN or b = Double.NaN return Double.NaN, else if a >= b return 1, otherwise return 0.