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/*
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_WEIGHTEDAVERAGE_H
#define FL_WEIGHTEDAVERAGE_H
#include "fl/defuzzifier/WeightedDefuzzifier.h"
namespace fl {
class Activated;
/**
The WeightedAverage class is a WeightedDefuzzifier that computes the
weighted average of a fuzzy set represented in an Aggregated Term.
@author Juan Rada-Vilela, Ph.D.
@see WeightedAverageCustom
@see WeightedSum
@see WeightedSumCustom
@see WeightedDefuzzifier
@see Defuzzifier
@since 4.0
*/
class FL_API WeightedAverage : public WeightedDefuzzifier {
public:
explicit WeightedAverage(Type type = Automatic);
explicit WeightedAverage(const std::string& type);
virtual ~WeightedAverage() FL_IOVERRIDE;
FL_DEFAULT_COPY_AND_MOVE(WeightedAverage)
virtual std::string className() const FL_IOVERRIDE;
virtual Complexity complexity(const Term* term) const FL_IOVERRIDE;
/**
Computes the weighted average of the given fuzzy set represented in
an Aggregated term as @f$y = \dfrac{\sum_i w_iz_i}{\sum_i w_i} @f$,
where @f$w_i@f$ is the activation degree of term @f$i@f$, and
@f$z_i = \mu_i(w_i) @f$.
From version 6.0, the implication and aggregation operators are not
utilized for defuzzification.
@param term is the fuzzy set represented as an Aggregated Term
@param minimum is the minimum value of the range (only used for Tsukamoto)
@param maximum is the maximum value of the range (only used for Tsukamoto)
@return the weighted average of the given fuzzy set
*/
virtual scalar defuzzify(const Term* term,
scalar minimum, scalar maximum) const FL_IOVERRIDE;
virtual WeightedAverage* clone() const FL_IOVERRIDE;
static Defuzzifier* constructor();
};
}
#endif /* FL_WEIGHTEDAVERAGE_H */
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