net.sourceforge.jfl.core
Class DoubleInterpolatedFuzzySet

java.lang.Object
  net.sourceforge.jfl.core.DoubleInterpolatedFuzzySet

All Implemented Interfaces:

IFuzzySet<java.lang.Double>

public class DoubleInterpolatedFuzzySet
extends java.lang.Object
implements IFuzzySet<java.lang.Double>

This class implements the IFuzzySet interface over Double typa members. This implementation not allows null element.

It implements the set backed by and array. The membership funtion is a linear interpolation of elements into the set.

Add an element into the set means add a point to the intorpolated membership function.

Call m the min element present into the set, all x < m has a memebrship value = u(m).
Call M the max element present into the set, all x > M has a membership value = u(M).

Author:

arons777@users.sourceforge.net

Field Summary

protected boolean	complementary
protected static int	DEFAULT_ARRAY_INCREMENT
protected java.lang.String	label
protected double[]	membership
protected int	size
protected double[]	support

Constructor Summary

DoubleInterpolatedFuzzySet()

DoubleInterpolatedFuzzySet(int initialCapacity)
Initialize the set with the passed capacity.

Method Summary

void	addAllElement(java.util.Set<java.lang.Double> elements, double membershipValue)
void	addElement(java.lang.Double element, double membershipValue)
DoubleInterpolatedFuzzySet	and(IFuzzySet<java.lang.Double> anotherSet) Performs a fuzzy logic and between this fuzzy set and the given one
DoubleInterpolatedFuzzySet	complement() Return a fuzzy set represents the complentary of the set.
protected void	extend() Extend the array by default value.
protected void	extend(int incrementSize) Extend the array by passed value.
java.lang.String	getLabel() Returns the label of this fuzzy set.
double	getMembership(java.lang.Double element) returns the membership value of the provided element to this IFuzzySet.
java.util.Set<java.lang.Double>	getSupport() Gets the fuzzy set support or, in other words, all the elements with non zero membership value.
java.util.Set<Interval>	getSupportIntervals() Gets the fuzzy set support or, in other words, all the elements with non zero membership value.
protected void	insert(double element, double membershipValue) Insert the passed element with the passed memebership value.
protected void	insert(double element, double membershipValue, int index)
protected double	membership(double element) Retrieve membership
DoubleInterpolatedFuzzySet	or(IFuzzySet<java.lang.Double> anotherSet) Performs a fuzzy logic or between this fuzzy set and the given one
protected double	remove(double element) Remove a point of interpolation from the set.
double	removeElement(java.lang.Double element)
protected int	searchLess(double element) Return index of the first element less than passed.
void	setLabel(java.lang.String label) Sets this fuzzy set label.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_ARRAY_INCREMENT

protected static final int DEFAULT_ARRAY_INCREMENT

See Also:

Constant Field Values

label

protected java.lang.String label

support

protected double[] support

membership

protected double[] membership

size

protected int size

complementary

protected boolean complementary

Constructor Detail

DoubleInterpolatedFuzzySet

public DoubleInterpolatedFuzzySet()

DoubleInterpolatedFuzzySet

public DoubleInterpolatedFuzzySet(int initialCapacity)

Initialize the set with the passed capacity.

Parameters:

initialCapacity -

Method Detail

setLabel

public void setLabel(java.lang.String label)

Description copied from interface: IFuzzySet

Sets this fuzzy set label. A fuzzy set label is just an human readable name for the fuzzy set.

Specified by:

setLabel in interface IFuzzySet<java.lang.Double>

Parameters:

label - the label to set

getLabel

public java.lang.String getLabel()

Description copied from interface: IFuzzySet

Returns the label of this fuzzy set.

Specified by:

getLabel in interface IFuzzySet<java.lang.Double>

Returns:

the label of this fuzzy set.

addAllElement

public void addAllElement(java.util.Set<java.lang.Double> elements,
                          double membershipValue)

addElement

public void addElement(java.lang.Double element,
                       double membershipValue)

removeElement

public double removeElement(java.lang.Double element)

getMembership

public double getMembership(java.lang.Double element)

Description copied from interface: IFuzzySet

returns the membership value of the provided element to this IFuzzySet.

Specified by:

getMembership in interface IFuzzySet<java.lang.Double>

Parameters:

element - the element of which we want the membership value for this IFuzzySet

Returns:

the membership value of the queried element

getSupport

public java.util.Set<java.lang.Double> getSupport()

Description copied from interface: IFuzzySet

Gets the fuzzy set support or, in other words, all the elements with non zero membership value.

Specified by:

getSupport in interface IFuzzySet<java.lang.Double>

Returns:

the fuzzy set support, null if is not possible to return the support as a set.

getSupportIntervals

public java.util.Set<Interval> getSupportIntervals()

Description copied from interface: IFuzzySet

Gets the fuzzy set support or, in other words, all the elements with non zero membership value.

Specified by:

getSupportIntervals in interface IFuzzySet<java.lang.Double>

Returns:

the fuzzy set support intervals, null if is not possible to return the support as interval.

complement

public DoubleInterpolatedFuzzySet complement()

Description copied from interface: IFuzzySet

Return a fuzzy set represents the complentary of the set.

Specified by:

complement in interface IFuzzySet<java.lang.Double>

Returns:

the fuzzy set represents the complentary of the set.

membership

protected double membership(double element)

Retrieve membership

Parameters:

element -

Returns:

searchLess

protected int searchLess(double element)

Return index of the first element less than passed. TODO (arons): change in a better algorithm.

Parameters:

d -

Returns:

index, -1 if all elements are greather of the one passet.

insert

protected void insert(double element,
                      double membershipValue)

Insert the passed element with the passed memebership value.

Parameters:

element -

membership -

insert

protected void insert(double element,
                      double membershipValue,
                      int index)

Parameters:

element -

membership -

index - index of element after insert the new one.

remove

protected double remove(double element)

Remove a point of interpolation from the set.

Parameters:

element - to be removed

Returns:

previous membership value.

extend

protected void extend()

Extend the array by default value.

extend

protected void extend(int incrementSize)

Extend the array by passed value.

Parameters:

incrementSize - increment size

and

public DoubleInterpolatedFuzzySet and(IFuzzySet<java.lang.Double> anotherSet)

Description copied from interface: IFuzzySet

Performs a fuzzy logic and between this fuzzy set and the given one

Specified by:

and in interface IFuzzySet<java.lang.Double>

Parameters:

anotherSet - the fuzzy set to perform the fuzzy logic and with

Returns:

the fuzzy set resulting from the and between this fuzzy set and the given one.

or

public DoubleInterpolatedFuzzySet or(IFuzzySet<java.lang.Double> anotherSet)

Description copied from interface: IFuzzySet

Performs a fuzzy logic or between this fuzzy set and the given one

Specified by:

or in interface IFuzzySet<java.lang.Double>

Parameters:

anotherSet - the fuzzy set to perform the fuzzy logic or with

Returns:

the fuzzy set resulting from the or between this fuzzy set and the given one.