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FuzzyOutput Class

The class represents the output of a Fuzzy Inference System.
Inheritance Hierarchy
SystemObject
  Accord.FuzzyFuzzyOutput

Namespace:  Accord.Fuzzy
Assembly:  Accord.Fuzzy (in Accord.Fuzzy.dll) Version: 3.8.0
Syntax
public class FuzzyOutput
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The FuzzyOutput type exposes the following members.

Properties
  NameDescription
Public propertyOutputList
Public propertyOutputVariable
Gets the LinguisticVariable acting as a Fuzzy Inference System Output.
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Methods
  NameDescription
Public methodEquals
Determines whether the specified object is equal to the current object.
(Inherited from Object.)
Protected methodFinalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object.)
Public methodGetHashCode
Serves as the default hash function.
(Inherited from Object.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
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Extension Methods
  NameDescription
Public Extension MethodHasMethod
Checks whether an object implements a method with the given name.
(Defined by ExtensionMethods.)
Public Extension MethodIsEqual
Compares two objects for equality, performing an elementwise comparison if the elements are vectors or matrices.
(Defined by Matrix.)
Public Extension MethodTo(Type)Overloaded.
Converts an object into another type, irrespective of whether the conversion can be done at compile time or not. This can be used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.)
Public Extension MethodToTOverloaded.
Converts an object into another type, irrespective of whether the conversion can be done at compile time or not. This can be used to convert generic types to numeric types during runtime.
(Defined by ExtensionMethods.)
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Remarks

The class keeps set of rule's output - pairs with the output fuzzy label and the rule's firing strength.

Sample usage:

// linguistic labels (fuzzy sets) that compose the distances
FuzzySet fsNear = new FuzzySet( "Near",
    new TrapezoidalFunction( 15, 50, TrapezoidalFunction.EdgeType.Right ) );
FuzzySet fsMedium = new FuzzySet( "Medium",
    new TrapezoidalFunction( 15, 50, 60, 100 ) );
FuzzySet fsFar = new FuzzySet( "Far",
    new TrapezoidalFunction( 60, 100, TrapezoidalFunction.EdgeType.Left ) );

// front distance (input)
LinguisticVariable lvFront = new LinguisticVariable( "FrontalDistance", 0, 120 );
lvFront.AddLabel( fsNear );
lvFront.AddLabel( fsMedium );
lvFront.AddLabel( fsFar );

// linguistic labels (fuzzy sets) that compose the angle
FuzzySet fsZero = new FuzzySet( "Zero",
    new TrapezoidalFunction( -10, 5, 5, 10 ) );
FuzzySet fsLP = new FuzzySet( "LittlePositive",
    new TrapezoidalFunction( 5, 10, 20, 25 ) );
FuzzySet fsP = new FuzzySet( "Positive",
    new TrapezoidalFunction( 20, 25, 35, 40 ) );
FuzzySet fsVP = new FuzzySet( "VeryPositive",
    new TrapezoidalFunction( 35, 40, TrapezoidalFunction.EdgeType.Left ) );

// angle
LinguisticVariable lvAngle = new LinguisticVariable( "Angle", -10, 50 );
lvAngle.AddLabel( fsZero );
lvAngle.AddLabel( fsLP );
lvAngle.AddLabel( fsP );
lvAngle.AddLabel( fsVP );

// the database
Database fuzzyDB = new Database( );
fuzzyDB.AddVariable( lvFront );
fuzzyDB.AddVariable( lvAngle );

// creating the inference system
InferenceSystem IS = new InferenceSystem( fuzzyDB, new CentroidDefuzzifier( 1000 ) );

// going straight
IS.NewRule( "Rule 1", "IF FrontalDistance IS Far THEN Angle IS Zero" );
// turning left
IS.NewRule( "Rule 2", "IF FrontalDistance IS Near THEN Angle IS Positive" );

...
// inference section

// setting inputs
IS.SetInput( "FrontalDistance", 20 );

// getting outputs
try
{
    FuzzyOutput fuzzyOutput = IS.ExecuteInference ( "Angle" );

    // showing the fuzzy output
    foreach ( FuzzyOutput.OutputConstraint oc in fuzzyOutput.OutputList )
    {
        Console.WriteLine( oc.Label + " - " + oc.FiringStrength.ToString( ) );
    }
}
catch ( Exception )
{
   ...
}
See Also