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Diffstat (limited to 'fuzzylite/fl/activation/Threshold.h')
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diff --git a/fuzzylite/fl/activation/Threshold.h b/fuzzylite/fl/activation/Threshold.h new file mode 100644 index 0000000..0baadfa --- /dev/null +++ b/fuzzylite/fl/activation/Threshold.h @@ -0,0 +1,183 @@ +/* + fuzzylite (R), a fuzzy logic control library in C++. + Copyright (C) 2010-2017 FuzzyLite Limited. All rights reserved. + Author: Juan Rada-Vilela, Ph.D. <jcrada@fuzzylite.com> + + This file is part of fuzzylite. + + fuzzylite is free software: you can redistribute it and/or modify it under + the terms of the FuzzyLite License included with the software. + + You should have received a copy of the FuzzyLite License along with + fuzzylite. If not, see <http://www.fuzzylite.com/license/>. + + fuzzylite is a registered trademark of FuzzyLite Limited. + */ + +#ifndef FL_THRESHOLD_H +#define FL_THRESHOLD_H + +#include "fl/fuzzylite.h" + +#include "fl/activation/Activation.h" + +#include <vector> + +namespace fl { + + /** + The Threshold class is a RuleBlock Activation method that activates the + rules whose activation degrees satisfy the equation given by the + comparison operator and the threshold, and deactivates the rules which do + not satisfy the equation. + + @author Juan Rada-Vilela, Ph.D. + @see Rule + @see RuleBlock + @see ActivationFactory + @since 6.0 + */ + + class FL_API Threshold : public Activation { + public: + + /** + Comparison is an enumerator that provides six comparison operators + between the activation degree @f$a@f$ and the threshold @f$\theta@f$. + */ + enum Comparison { + /**@f$a < \theta@f$*/ + LessThan, + /**@f$a \leq \theta@f$*/ + LessThanOrEqualTo, + /**@f$a = \theta@f$*/ + EqualTo, + /**@f$a \neq \theta@f$*/ + NotEqualTo, + /**@f$a \geq \theta@f$*/ + GreaterThanOrEqualTo, + /**@f$a > \theta@f$*/ + GreaterThan + }; + private: + Comparison _comparison; + scalar _value; + public: + explicit Threshold(Comparison comparison = GreaterThanOrEqualTo, scalar threshold = 0.0); + explicit Threshold(const std::string& comparison, scalar threshold); + virtual ~Threshold(); + FL_DEFAULT_COPY_AND_MOVE(Threshold) + + virtual std::string className() const FL_IOVERRIDE; + + /** + Returns the comparison operator followed by the threshold. + @return comparison operator and threshold + */ + virtual std::string parameters() const FL_IOVERRIDE; + + /** + Configures the activation method with the comparison operator and the + threshold. + @param parameters is the comparison operator and threshold + */ + virtual void configure(const std::string& parameters) FL_IOVERRIDE; + + /** + Sets the comparison operator for the activation method + @param comparison is the operator for the activation method + */ + virtual void setComparison(Comparison comparison); + + /** + Gets the comparison operator for the activation method + @return comparison operator for the activation method + */ + virtual Comparison getComparison() const; + + /** + Returns the comparison operator of the activation method + @return the comparison operator in (`==`, `!=`, `<`, `>`, `<=`, `>=`) + */ + virtual std::string comparisonOperator() const; + + /** + Returns the given comparison operator of the activation method + @param comparison is a valid enum value + @return the comparison operator for the given enum value + @throws fl::Exception if the given comparison operator is not valid + */ + virtual std::string comparisonOperator(Comparison comparison) const; + + /** + Returns the list of available comparison operators of the activation + method + @return (`==`, `!=`, `<`, `>`, `<=`, `>=`) + */ + virtual std::vector<std::string> availableComparisonOperators() const; + + + /** + Parses the comparison operator, or throws an + exception if the parameter does not correspond to a valid operator + @param comparisonOperator is an operator in (`==`, `!=`, `<`, `>`, + `<=`, `>=`) + */ + virtual Comparison parseComparison(const std::string& comparisonOperator) const; + + /** + Sets the threshold value of the activation method + @param value is the threshold value for activation degrees + */ + virtual void setValue(scalar value); + + /** + Gets the threshold value of the activation method + @return the threshold value of the activation method + */ + virtual scalar getValue() const; + + /** + Sets the comparison operator and the threshold for the activation + method + @param comparison is the comparison enumerator + @param value is the threshold of the activation method + */ + virtual void setThreshold(Comparison comparison, scalar value); + + /** + Sets the comparison operator and the threshold for the activation method + @param comparison is a valid comparison operator + @param value is the threshold for activation degrees + @throws fl::Exception if the comparison operator is not valid + */ + virtual void setThreshold(const std::string& comparison, scalar value); + + /** + Returns whether the activation method will activate a rule with + the given activation degree + @param activationDegree an activation degree + @return whether the comparison equation is satisfied with the + activation degree and the threshold + */ + virtual bool activatesWith(scalar activationDegree) const; + + + virtual Complexity complexity(const RuleBlock* ruleBlock) const FL_IOVERRIDE; + + /** + Activates the rules whose activation degrees satisfy the comparison + equation with the given threshold, and deactivate the rules which do + not. + @param ruleBlock is the rule block to activate + */ + virtual void activate(RuleBlock* ruleBlock) FL_IOVERRIDE; + + virtual Threshold* clone() const FL_IOVERRIDE; + + static Activation* constructor(); + }; + +} + +#endif /* FL_THRESHOLD_H */ |