infosapient.system
Class FzyGaussian

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

public class FzyGaussian

extends FzySCurve

Class FzyGaussian builds a fuzzy set surface based on the classic Gaussian function rather than a sigmoidal function. f(x) = e^(-K(cp - x)^2) where K = width factor cp = central point of the curve Slope of membership of this function goes to zero very quickly. To be useful, values of k should range from .9 to 5.0.

Version:

$Revision: 1.1.1.1 $

See Also:

Serialized Form

Field Summary

(package private) static long

serialVersionUID

Fields inherited from class infosapient.system.FzySCurve

highInflexionPt, lowInflexionPt, phighInflexionPt, plowInflexionPt, 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

FzyGaussian()

FzyGaussian(FzyAttribute fa, double center, double kFactor)
Constructor for creating a fuzzy set using a gaussian function.

Method Summary

java.lang.Object	clone() Method for Cloneable interface -- provides a deep copy of the current set, EXCEPT the hedges.
void	save(int ntabs)
java.lang.String	toString() Used to provide a text description of this fuzzy set.
java.lang.String	typeAsString()

Methods inherited from class infosapient.system.FzySCurve

getHighInflexionPt, getLowInflexionPt, initializeMembership, setHighInflexionPt, setLowInflexionPt

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

Constructor Detail

FzyGaussian

public FzyGaussian()

FzyGaussian

public FzyGaussian(FzyAttribute fa,
                   double center,
                   double kFactor)
            throws FzySystemException

Constructor for creating a fuzzy set using a gaussian function.

NOTE: You cannot create a shouldered set using a gaussian function. Nor can you specify the low and high domain as these are calculated.

Parameters:

FzyAttribute - - the owning attribute for this set

double - - center (the center of the set (aka 100% membership))

kfactor - - the width factor to be used in the construction. Useful values should range from .9 to 5.0. Cannot be <= zero.

Throws:

FzySystemException -

Method Detail

clone

public java.lang.Object clone()

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

Overrides:

clone in class FzySCurve

Returns:

Object the new FzyGaussian cloned.

save

public void save(int ntabs)

toString

public java.lang.String toString()

Used to provide a text description of this fuzzy set.

Overrides:

toString in class FzySCurve

typeAsString

public java.lang.String typeAsString()

Overrides:

typeAsString in class FzySCurve