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114 lines
3.1 KiB
C++
114 lines
3.1 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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* TrapezoidalTerm.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 "TrapezoidalTerm.h"
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namespace fl {
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TrapezoidalTerm::TrapezoidalTerm() :
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LinguisticTerm(), _b(0), _c(0) {
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}
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TrapezoidalTerm::TrapezoidalTerm(const std::string& name, flScalar minimum,
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flScalar maximum) :
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LinguisticTerm(name, minimum, maximum), _b(0), _c(0) {
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setB(minimum + (maximum - minimum) * 1 / 5);
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setC(minimum + (maximum - minimum) * 4 / 5);
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}
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TrapezoidalTerm::TrapezoidalTerm(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(0), _c(0) {
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setB(minimum + (maximum - minimum) * 1 / 5);
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setC(minimum + (maximum - minimum) * 4 / 5);
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}
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TrapezoidalTerm::~TrapezoidalTerm() {
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}
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void TrapezoidalTerm::setA(flScalar a) {
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setMinimum(a);
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}
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flScalar TrapezoidalTerm::a() const {
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return minimum();
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}
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void TrapezoidalTerm::setB(flScalar b) {
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this->_b = b;
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}
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flScalar TrapezoidalTerm::b() const {
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return this->_b;
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}
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void TrapezoidalTerm::setC(flScalar c) {
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this->_c = c;
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}
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flScalar TrapezoidalTerm::c() const {
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return this->_c;
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}
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void TrapezoidalTerm::setD(flScalar d) {
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setMaximum(d);
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}
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flScalar TrapezoidalTerm::d() const {
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return maximum();
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}
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TrapezoidalTerm* TrapezoidalTerm::clone() const {
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return new TrapezoidalTerm(*this);
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}
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flScalar TrapezoidalTerm::membership(flScalar crisp) const {
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if (crisp < minimum() || crisp > maximum()) {
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return flScalar(0);
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}
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if (crisp < b()) {
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return fuzzyOperator().modulation().execute(modulation(),
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FuzzyOperation::Scale(a(), b(), crisp, 0, 1));
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}
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if (crisp < c()) {
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return fuzzyOperator().modulation().execute(modulation(), flScalar(1.0));
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}
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if (crisp < d()) {
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return fuzzyOperator().modulation().execute(modulation(),
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FuzzyOperation::Scale(c(), d(), crisp, 1, 0));
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}
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return flScalar(0.0);
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}
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LinguisticTerm::eMembershipFunction TrapezoidalTerm::type() const {
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return MF_TRAPEZOIDAL;
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}
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std::string TrapezoidalTerm::toString() const {
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std::stringstream ss;
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ss << LinguisticTerm::toString();
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ss << "Trapezoidal (" << a() << " " << b() << " " << c() << " " << d() << ")";
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return ss.str();
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}
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} // namespace fuzzy_lite
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