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95 lines
2.5 KiB
C++
95 lines
2.5 KiB
C++
/* 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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/*
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* TriangularTerm.cpp
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*
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* Created on: Dec 13, 2009
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* Author: jcrada
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*/
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#include "TriangularTerm.h"
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namespace fl {
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TriangularTerm::TriangularTerm() :
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LinguisticTerm(), _b(0) {
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}
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TriangularTerm::TriangularTerm(const std::string& name, flScalar minimum,
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flScalar maximum) :
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LinguisticTerm(name, minimum, maximum), _b((minimum + maximum) / 2) {
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}
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TriangularTerm::TriangularTerm(const FuzzyOperator& fuzzy_op,
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const std::string& name, flScalar minimum, flScalar maximum) :
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LinguisticTerm(fuzzy_op, name, minimum, maximum), _b((minimum + maximum) / 2) {
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}
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TriangularTerm::~TriangularTerm() {
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}
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void TriangularTerm::setA(flScalar a) {
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setMinimum(a);
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}
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flScalar TriangularTerm::a() const {
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return minimum();
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}
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void TriangularTerm::setB(flScalar b) {
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this->_b = b;
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}
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flScalar TriangularTerm::b() const {
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return this->_b;
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}
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void TriangularTerm::setC(flScalar c) {
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setMaximum(c);
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}
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flScalar TriangularTerm::c() const {
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return maximum();
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}
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TriangularTerm* TriangularTerm::clone() const {
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return new TriangularTerm(*this);
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}
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flScalar TriangularTerm::membership(flScalar crisp) const {
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if (crisp > maximum() || crisp < minimum()) {
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return flScalar(0.0);
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}
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flScalar result = crisp < b() ? FuzzyOperation::Scale(a(), b(), crisp, 0, 1)
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: FuzzyOperation::Scale(b(), c(), crisp, 1, 0);
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return fuzzyOperator().modulation().execute(result, modulation());
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}
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LinguisticTerm::eMembershipFunction TriangularTerm::type() const {
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return MF_TRIANGULAR;
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}
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std::string TriangularTerm::toString() const {
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std::stringstream ss;
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ss << LinguisticTerm::toString();
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ss << "Triangular (" << a() << " " << b() << " " << c() << ")";
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return ss.str();
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}
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} // namespace fuzzy_lite
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