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63 lines
2.2 KiB
C++
63 lines
2.2 KiB
C++
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/* Copyright 2010 Juan Rada-Vilela
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include "FuzzyDefuzzifier.h"
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#include "CompoundTerm.h"
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#include "TakagiSugenoTerm.h"
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namespace fl {
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FuzzyDefuzzifier::~FuzzyDefuzzifier() {
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}
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std::string CoGDefuzzifier::name() const {
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return "CoG";
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}
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flScalar CoGDefuzzifier::defuzzify(const LinguisticTerm* term, int number_of_samples,
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const AreaCentroidAlgorithm* algorithm) const {
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flScalar x, y;
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algorithm->centroid(term, x, y, number_of_samples);
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return x;
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}
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std::string TakagiSugenoDefuzzifier::name() const {
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return "TSK";
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}
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flScalar TakagiSugenoDefuzzifier::defuzzify(const LinguisticTerm* term, int number_of_samples,
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const AreaCentroidAlgorithm* algorithm) const {
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const CompoundTerm* out = dynamic_cast<const CompoundTerm*> (term);
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if (!out) {
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FL_LOG("<CompoundTerm> expected, but <" << term->toString() << "> found." <<
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"Takagi-Sugeno defuzzification works only on the output of Takagi-Sugeno Rules." );
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return -1;
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}
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flScalar result = 0;
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flScalar sum_wi = 0;
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for (int i = 0; i < out->numberOfTerms(); ++i) {
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const TakagiSugenoTerm* t = dynamic_cast<const TakagiSugenoTerm*> (&out->term(i));
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if (!t) {
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FL_LOG("<TakagiSugenoTerm> expected, but <" << out->term(i).toString() << "> found." <<
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"Takagi-Sugeno defuzzification works only on the output of Takagi-Sugeno Rules");
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return -1;
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}
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result += t->value() * t->weight();
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sum_wi += t->weight();
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}
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return result / sum_wi;
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}
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}
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