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/*
Author: Juan Rada-Vilela, Ph.D.
Copyright (C) 2010-2014 FuzzyLite Limited
All rights reserved
This file is part of fuzzylite.
fuzzylite is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
fuzzylite is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
for more details.
You should have received a copy of the GNU Lesser General Public License
along with fuzzylite. If not, see <http://www.gnu.org/licenses/>.
fuzzylite™ is a trademark of FuzzyLite Limited.
*/
#include "fl/term/Accumulated.h"
#include "fl/imex/FllExporter.h"
#include "fl/norm/SNorm.h"
#include "fl/norm/s/Maximum.h"
#include "fl/term/Activated.h"
namespace fl {
Accumulated::Accumulated(const std::string& name, scalar minimum, scalar maximum,
SNorm* accumulation)
: Term(name), _minimum(minimum), _maximum(maximum), _accumulation(accumulation) {
}
Accumulated::Accumulated(const Accumulated& other) : Term(other) {
copyFrom(other);
}
Accumulated& Accumulated::operator=(const Accumulated& other) {
if (this != &other) {
clear();
_accumulation.reset(fl::null);
Term::operator=(other);
copyFrom(other);
}
return *this;
}
Accumulated::~Accumulated() {
clear();
}
void Accumulated::copyFrom(const Accumulated& source) {
_minimum = source._minimum;
_maximum = source._maximum;
if (source._accumulation.get())
_accumulation.reset(source._accumulation->clone());
for (std::size_t i = 0; i < source._terms.size(); ++i) {
_terms.push_back(source._terms.at(i)->clone());
}
}
std::string Accumulated::className() const {
return "Accumulated";
}
scalar Accumulated::membership(scalar x) const {
if (fl::Op::isNaN(x)) return fl::nan;
if (not (_terms.empty() or _accumulation.get())) { //Exception for IntegralDefuzzifiers
throw fl::Exception("[accumulation error] "
"accumulation operator needed to accumulate " + toString(), FL_AT);
}
scalar mu = 0.0;
for (std::size_t i = 0; i < _terms.size(); ++i) {
mu = _accumulation->compute(mu, _terms.at(i)->membership(x));
}
return mu;
}
scalar Accumulated::activationDegree(const Term* forTerm) const {
scalar result = 0.0;
for (std::size_t i = 0; i < _terms.size(); ++i) {
Activated* activatedTerm = _terms.at(i);
if (activatedTerm->getTerm() == forTerm) {
if (_accumulation.get()) result = _accumulation->compute(result, activatedTerm->getDegree());
else result += activatedTerm->getDegree(); //Default for WeightDefuzzifier
}
}
return result;
}
std::string Accumulated::parameters() const {
FllExporter exporter;
std::ostringstream ss;
ss << exporter.toString(_accumulation.get());
ss << " " << Op::str(_minimum) << " " << Op::str(_maximum) << " ";
for (std::size_t i = 0; i < _terms.size(); ++i) {
ss << " " << exporter.toString(_terms.at(i));
}
return ss.str();
}
void Accumulated::configure(const std::string& parameters) {
(void) parameters;
}
Accumulated* Accumulated::clone() const {
return new Accumulated(*this);
}
std::string Accumulated::toString() const {
std::vector<std::string> accumulate;
for (std::size_t i = 0; i < _terms.size(); ++i) {
accumulate.push_back(_terms.at(i)->toString());
}
FllExporter exporter;
std::ostringstream ss;
ss << _name << ": " << className() << " "
<< exporter.toString(_accumulation.get()) << "["
<< fl::Op::join(accumulate, ",") << "]";
return ss.str();
}
void Accumulated::setMinimum(scalar minimum) {
this->_minimum = minimum;
}
scalar Accumulated::getMinimum() const {
return this->_minimum;
}
void Accumulated::setMaximum(scalar maximum) {
this->_maximum = maximum;
}
scalar Accumulated::getMaximum() const {
return this->_maximum;
}
void Accumulated::setRange(scalar minimum, scalar maximum) {
setMinimum(minimum);
setMaximum(maximum);
}
scalar Accumulated::range() const {
return this->_maximum - this->_minimum;
}
void Accumulated::setAccumulation(SNorm* accumulation) {
this->_accumulation.reset(accumulation);
}
SNorm* Accumulated::getAccumulation() const {
return this->_accumulation.get();
}
/**
* Operations for std::vector _terms
*/
void Accumulated::addTerm(const Term* term, scalar degree, const TNorm* activation) {
this->_terms.push_back(new Activated(term, degree, activation));
}
void Accumulated::addTerm(Activated* term) {
this->_terms.push_back(term);
}
Activated* Accumulated::removeTerm(int index) {
Activated* term = this->_terms.at(index);
this->_terms.erase(this->_terms.begin() + index);
return term;
}
void Accumulated::clear() {
for (std::size_t i = 0; i < _terms.size(); ++i) {
delete _terms.at(i);
}
_terms.clear();
}
Activated* Accumulated::getTerm(int index) const {
return this->_terms.at(index);
}
const std::vector<Activated*>& Accumulated::terms() const {
return this->_terms;
}
std::vector<Activated*>& Accumulated::terms() {
return this->_terms;
}
int Accumulated::numberOfTerms() const {
return _terms.size();
}
bool Accumulated::isEmpty() const {
return _terms.empty();
}
}
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