nrc.fuzzy
Class LeftLinearFunction

java.lang.Object
  |
  +--nrc.fuzzy.LeftLinearFunction

All Implemented Interfaces:

FuzzySetFunction, java.io.Serializable

public class LeftLinearFunction

extends java.lang.Object

implements FuzzySetFunction, java.io.Serializable

An implementation of the FuzzySetFunction interface to provide a class with the ability to generate a FuzzySet that is a straight line (linear) from membership value 0 on the left to 1 on the right. This class is typically used when constructing instances of the classes LFuzzySet and LRFuzzySet.

See Also:

LFuzzySet, LRFuzzySet, TrapezoidFuzzySet, Serialized Form

Constructor Summary

LeftLinearFunction()
Create an instance of the LeftLinearFunction class.

LeftLinearFunction(int numPoints)
Create an instance of the LeftLinearFunction class with the default number of points in the FuzzySets generated by the generateFuzzySet(double leftX, double rightX) method set to numPoints.

Method Summary

nrc.fuzzy.FuzzySet	generateFuzzySet(double leftX, double rightX) Generates a FuzzySet that is a straight line (linear) from with membership value 0 on the left to 1 on the right.
nrc.fuzzy.FuzzySet	generateFuzzySet(double leftX, double rightX, int numPoints) Generates a FuzzySet that is a straight line (linear) from with membership value 0 on the left to 1 on the right.
static void	setNumberOfPoints(int numPoints) Change the static variable defaultNumPoints to a new value (will be set to 2 if an attempt is made to set it to < 2).

Methods inherited from class java.lang.Object

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

Constructor Detail

LeftLinearFunction

public LeftLinearFunction()

Create an instance of the LeftLinearFunction class.

LeftLinearFunction

public LeftLinearFunction(int numPoints)

Create an instance of the LeftLinearFunction class with the default number of points in the FuzzySets generated by the generateFuzzySet(double leftX, double rightX) method set to numPoints.

Parameters:

numPoints - the default number of points in the FuzzyValues created by the generateFuzzySet(double leftX, double rightX) method

Method Detail

generateFuzzySet

public nrc.fuzzy.FuzzySet generateFuzzySet(double leftX,
                                           double rightX)

Generates a FuzzySet that is a straight line (linear) from with membership value 0 on the left to 1 on the right. The number of points in the FuzzySet will be determined by the static variable defaultNumPoints (normally set to 2).

Specified by:

generateFuzzySet in interface FuzzySetFunction

Parameters:

leftX - the left most X value of the FuzzySet (where membership value is 0)

rightX - the right most X value of the FuzzySet (where membership value is 1)

Returns:

a FuzzySet with X values between leftX and rightX

generateFuzzySet

public nrc.fuzzy.FuzzySet generateFuzzySet(double leftX,
                                           double rightX,
                                           int numPoints)

Generates a FuzzySet that is a straight line (linear) from with membership value 0 on the left to 1 on the right.

Specified by:

generateFuzzySet in interface FuzzySetFunction

Parameters:

leftX - the left most X value of the FuzzySet (where membership value is 0)

rightX - the right most X value of the FuzzySet (where membership value is 1)

numPoints - the number of points to generate for the set (if < 2 then it will be set to 2)

Returns:

a FuzzySet with X values between leftX and rightX

setNumberOfPoints

public static void setNumberOfPoints(int numPoints)

Change the static variable defaultNumPoints to a new value (will be set to 2 if an attempt is made to set it to < 2).

Parameters:

numPoints - the new value for the static variable defaultNumPoints