infosapient.system
Class FzySCurve

java.lang.Object
  |
  +--infosapient.system.ObservableImpl
        |
        +--infosapient.system.FzySystemComponent
              |
              +--infosapient.system.FzyClauseComponent
                    |
                    +--infosapient.system.FzySet
                          |
                          +--infosapient.system.FzySCurve

Direct Known Subclasses:

FzyBeta, FzyGaussian, FzyPI

public class FzySCurve

extends FzySet

implements java.lang.Cloneable

Class FzySCurve

FzySCurve represents a Fuzzy set as a sigmoidal (logistic function) curve. Specializations of this class are:

Version:

$Revision: 1.1.1.1 $

See Also:

FzyGaussian, FzyPI, FzyBeta, FzyWeightedBeta, FzySingleton, Serialized Form

Field Summary

private double	highInflexionPt
private double	lowInflexionPt
private double	phighInflexionPt
private double	plowInflexionPt
(package private) static long	serialVersionUID

Fields inherited from class infosapient.system.FzySet

alfaCut, completeMembership, curveSide, domain, hasSolution, hedges, height, leftShouldered, membership, myAttribute, resolvedValue, rightShouldered, serialVersionUID, setType, twoSided, VECMAX

Fields inherited from class infosapient.system.FzyClauseComponent

owner, text

Fields inherited from class infosapient.system.FzySystemComponent

DEBUG_, myID, name, pcs, serialVersionUID, trace, vcs

Fields inherited from class infosapient.system.ObservableImpl

arr, changed, obs, serialVersionUID

Constructor Summary

FzySCurve()

FzySCurve(FzyAttribute fa, double lowE, double hiE, double m)

Method Summary

java.lang.Object	clone() Method for Cloneable interface -- provides a deep copy of the current set.
double	getHighInflexionPt()
double	getLowInflexionPt()
FzySet	initializeMembership() Initialize this set's membership using a sinusoid (logistical) function.
FzySCurve	setHighInflexionPt(double high, double cM)
FzySCurve	setLowInflexionPt(double low, double cM)
java.lang.String	toString() Used to provide a text description of this fuzzy set.
java.lang.String	typeAsString()

Methods inherited from class infosapient.system.FzySet

addHedge, doesContain, domainForMembership, dump, dumpAsStringBuffer, getAlphaCut, getAttribute, getCmpMembership, getDOM, getDomain, getDomainArray, getHedges, getHighDomain, getIndexForDomain, getLowDomain, getMaxHeight, getMemberArray, getMembership, getMinHeight, getQualifiedName, getSides, getSolution, getSolutionDOM, getVECMAX, hasSolution, initializeDomain, integrateMbr, integrateMbr, isLeftShouldered, isNormal, isRightShouldered, isTwoSided, lessThanOrEquals, printOn, reset, setAttribute, setCmpMembership, setDomain, setDomainArray, setHedges, setHighDomain, setLeftShouldered, setLowDomain, setMembership, setMembershipArray, setRightShouldered, setSolution, setTwoSided, sumDomain, toXML, validate, validate

Methods inherited from class infosapient.system.FzyClauseComponent

append, append, getOwner, getText, setOwnerClause, setText, toText

Methods inherited from class infosapient.system.FzySystemComponent

addPropertyChangeListener, addVetoableChangeListener, equals, getID, getName, getPropertyChangeSupport, getVetoableChangeSupport, hashCode, removePropertyChangeListener, removeVetoableChangeListener, setID, setName

Methods inherited from class infosapient.system.ObservableImpl

addObserver, clearChanged, containsObserver, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

, finalize, getClass, notify, notifyAll, registerNatives, wait, wait, wait

Field Detail

serialVersionUID

static final long serialVersionUID

lowInflexionPt

private double lowInflexionPt

plowInflexionPt

private double plowInflexionPt

highInflexionPt

private double highInflexionPt

phighInflexionPt

private double phighInflexionPt

Constructor Detail

FzySCurve

public FzySCurve()

FzySCurve

public FzySCurve(FzyAttribute fa,
                 double lowE,
                 double hiE,
                 double m)
          throws FzySystemException

Method Detail

clone

public java.lang.Object clone()

Method for Cloneable interface -- provides a deep copy of the current set.

Overrides:

clone in class FzySet

Returns:

Object the new FzySCurve cloned.

getHighInflexionPt

public double getHighInflexionPt()

getLowInflexionPt

public double getLowInflexionPt()

initializeMembership

public FzySet initializeMembership()
                            throws FzySystemException

Initialize this set's membership using a sinusoid (logistical) function.

[ i..(VECMAX-1)]:

[ domain[i] <= lowInflexionPoint ] { membership[i] = 2.0 ∗ ((domain[i]-lowDomain) / domainValOfCompleteMembership)^2.0;}

[ (domain[i] > lowInflextionPoint) && (domain[i] < domainValOfCompleteMembership) ] { membership[i] = 1.0 - 2.0 ∗ ((domain[i]-lowDomain)/(domainValOfCompleteMembership-lowDomain))^2.0;}

[ domain[i] == domainValOfCompleteMembership ] { membership[i] = 1.0; }

[ (domain[i] > domainValOfCompleteMembership) && (domain[i] <= highInflextionPoint) ] { membership[i] = 1.0 - 2.0 ∗ ((domainValOfCompleteMembership-domain[i])/(highDomain-domainValOfCompleteMembership))^2.0;}

[ domain[i] > highInflexionPoint ] { membership[i] = 2.0 ∗ (highDomain-domain[i])/(highDomain-domainValOfCompleteMembership))^2.0;}

Overrides:

initializeMembership in class FzySet

Tags copied from class: FzySet

Returns:

FzySet the set.

Throws:

FzySystemException - if a computation exception occurs.

setHighInflexionPt

public FzySCurve setHighInflexionPt(double high,
                                    double cM)

setLowInflexionPt

public FzySCurve setLowInflexionPt(double low,
                                   double cM)

toString

public java.lang.String toString()

Used to provide a text description of this fuzzy set.

Overrides:

toString in class java.lang.Object

typeAsString

public java.lang.String typeAsString()

Overrides:

typeAsString in class FzySet