FuzzySet class

Base class for fuzzy sets. This type of sets are defined by a membership function which can be any arbitrary shape but are typically triangular or trapezoidal. They define a gradual transition from regions completely outside the set to regions completely within the set, thereby enabling a value to have partial membership to a set.

This class is derived from {@link FuzzyTerm} so it can be directly used in fuzzy rules. According to the composite design pattern, a fuzzy set can be considered as an atomic fuzzy term.

@author {@link https://github.com/Mugen87|Mugen87}

Inheritance

• Object
• FuzzyTerm
• FuzzySet

Implementers

• LeftSCurveFuzzySet
• LeftShoulderFuzzySet
• NormalDistFuzzySet
• RightSCurveFuzzySet
• RightShoulderFuzzySet
• SingletonFuzzySet
• TriangularFuzzySet

Constructors

FuzzySet([double representativeValue = 0])

Constructs a new fuzzy set with the given values.

Properties

degreeOfMembership ↔ double

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

left ↔ double

getter/setter pair

representativeValue ↔ double

getter/setter pair

right ↔ double

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

uuid → String?

Unique ID, primarily used in context of serialization/deserialization.

no setter, inherited

Methods

clearDegreeOfMembership() → FuzzySet

Clears the degree of membership value.

override

computeDegreeOfMembership(double value) → double

Computes the degree of membership for the given value. Notice that this method does not set {@link FuzzySet#degreeOfMembership} since other classes use it in order to calculate intermediate degree of membership values. This method be implemented by all concrete fuzzy set classes.

fromJSON(Map<String, dynamic> json) → FuzzySet

Restores this instance from the given JSON object.

override

getDegreeOfMembership() → double

Returns the degree of membership.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toJSON() → Map<String, dynamic>

Transforms this instance into a JSON object.

override

toString() → String

A string representation of this object.

inherited

updateDegreeOfMembership(double value) → FuzzySet

Updates the degree of membership by the given value. This method is used when the set is part of a fuzzy rule's consequent.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited