nrc.fuzzy
Class LFuzzySet

java.lang.Object
  |
  +--nrc.fuzzy.FuzzySet
        |
        +--nrc.fuzzy.LFuzzySet

All Implemented Interfaces:

java.lang.Cloneable, java.io.Serializable

Direct Known Subclasses:

LeftGaussianFuzzySet, LeftLinearFuzzySet, SFuzzySet

public class LFuzzySet

extends FuzzySet

implements java.io.Serializable

Used to build specialized FuzzySets that in general have membership values of 0 at the left edge and 1 at the right edge. Users do not generally use this class to create FuzzySets directly but most often use the subclasses of this class, such as SFuzzySet or LeftLinearFuzzySet. The shape of the curves between the left and right x values of an LFuzzySet are determined by the function specified. This function will be a class that implements the FuzzySetFunction Interface. In particular the SFuzzySet class uses the SFunction class to create an S-shaped curve between the left and right x values.

The diagram below shows the concept of the LFuzzySet.



The code below shows how the SFuzzySet constructor is defined.

  private static SFunction ssf = new SFunction();

  public SFuzzySet(double leftEdge, double rightEdge) throws XValuesOutOfOrderException 
  {
      super(leftEdge, rightEdge, ssf);
  }
 

See Also:

FuzzySet, LRFuzzySet, SFunction, SFuzzySet, LeftLinearFunction, LeftLinearFuzzySet, Serialized Form

Nested Class Summary

Nested classes inherited from class nrc.fuzzy.FuzzySet

FuzzySet.UITools

Field Summary

Fields inherited from class nrc.fuzzy.FuzzySet

BFALSE, BTRUE, COLLINEAR_OR_PARALLEL, INCREMENT, INTERSECTION, MAX_INITIAL_POINTS, MAXMIN, NO_INTERSECTION, numPoints, set, simplified, SUM, tool, toStringPrecision, UNION

Constructor Summary

LFuzzySet(double leftX, double rightX, nrc.fuzzy.FuzzySetFunction leftFunction)
Create an LFuzzySet using the FuzzySetFunction supplied to construct it.

Method Summary

protected void

checkParameters(double leftX, double rightX) Make sure that left x value is less than or equal to the right x value.

Methods inherited from class nrc.fuzzy.FuzzySet

appendSetPoint, appendSetPoint, centerOfAreaDefuzzify, checkXValueOrder, checkYValueRange, concat, concat, confineToXBounds, copyFuzzySet, equals, findMaxYOverlapValue, fuzzyComplement, fuzzyEqual, fuzzyIntersection, fuzzyIntersection, fuzzyIntersectionUnion, fuzzyNormalize, fuzzyScale, fuzzySum, fuzzySum, fuzzyUnion, fuzzyUnion, getAlphaCut, getArea, getArea, getMaxY, getMembership, getMinY, getPoint, getSupport, getUITools, getX, getXforMembership, getY, goingDown, goingUp, horizontalIntersection, horizontalIntersectionUnion, horizontalUnion, incrementArrayLength, incrementArrayLength, insertSetPoint, insertSetPoint, isConvex, isEmpty, isNormal, isSimplified, maximumDefuzzify, maximumOfIntersection, maximumOfIntersection, momentDefuzzify, noIntersectionTest, nonIntersectionTest, plotFuzzySet, plotFuzzySets, removeSetPoint, removeSetPoint, sameDirection, sameSign, setToStringPrecision, shiftArrayLeft, shiftArrayRight, simplifySet, size, testArrayLength, toString, trimToSize, weightedAverageDefuzzify

Methods inherited from class java.lang.Object

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

Constructor Detail

LFuzzySet

public LFuzzySet(double leftX,
                 double rightX,
                 nrc.fuzzy.FuzzySetFunction leftFunction)
          throws XValuesOutOfOrderException

Create an LFuzzySet using the FuzzySetFunction supplied to construct it.

Parameters:

leftX - Left x value (where membership is 0) of the L (left sided) FuzzySet

rightX - Right x value (where membership is 1) of the L (left sided) FuzzySet

leftFunction - Function that will generate the shaped left side for the FuzzySet

Throws:

XValuesOutOfOrderException

Method Detail

checkParameters

protected void checkParameters(double leftX,
                               double rightX)
                        throws XValuesOutOfOrderException

Make sure that left x value is less than or equal to the right x value.

Parameters:

leftX - Left x value (where membership is 0) of the L (left sided) FuzzySet

rightX - Right x value (where membership is 1) of the L (left sided) FuzzySet

Throws:

XValuesOutOfOrderException