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Diffstat (limited to 'fuzzylite/src/variable/OutputVariable.cpp')
| -rw-r--r-- | fuzzylite/src/variable/OutputVariable.cpp | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/fuzzylite/src/variable/OutputVariable.cpp b/fuzzylite/src/variable/OutputVariable.cpp new file mode 100644 index 0000000..6e1d906 --- /dev/null +++ b/fuzzylite/src/variable/OutputVariable.cpp @@ -0,0 +1,195 @@ +/* + 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/variable/OutputVariable.h" + +#include "fl/defuzzifier/Defuzzifier.h" +#include "fl/imex/FllExporter.h" +#include "fl/norm/SNorm.h" +#include "fl/term/Accumulated.h" +#include "fl/term/Activated.h" + +namespace fl { + + OutputVariable::OutputVariable(const std::string& name, + scalar minimum, scalar maximum) + : Variable(name, minimum, maximum), + _fuzzyOutput(new Accumulated(name, minimum, maximum)), _outputValue(fl::nan), + _previousOutputValue(fl::nan), _defaultValue(fl::nan), + _lockOutputValueInRange(false), _lockPreviousOutputValue(false) { + } + + OutputVariable::OutputVariable(const OutputVariable& other) : Variable(other) { + copyFrom(other); + } + + OutputVariable& OutputVariable::operator=(const OutputVariable& other) { + if (this != &other) { + _fuzzyOutput.reset(fl::null); + _defuzzifier.reset(fl::null); + + Variable::operator=(other); + copyFrom(other); + } + return *this; + } + + OutputVariable::~OutputVariable() { + } + + void OutputVariable::copyFrom(const OutputVariable& other) { + _fuzzyOutput.reset(other._fuzzyOutput->clone()); + if (other._defuzzifier.get()) _defuzzifier.reset(other._defuzzifier->clone()); + _outputValue = other._outputValue; + _previousOutputValue = other._previousOutputValue; + _defaultValue = other._defaultValue; + _lockOutputValueInRange = other._lockOutputValueInRange; + _lockPreviousOutputValue = other._lockPreviousOutputValue; + } + + void OutputVariable::setName(const std::string& name) { + Variable::setName(name); + this->_fuzzyOutput->setName(name); + } + + Accumulated* OutputVariable::fuzzyOutput() const { + return this->_fuzzyOutput.get(); + } + + void OutputVariable::setMinimum(scalar minimum) { + Variable::setMinimum(minimum); + this->_fuzzyOutput->setMinimum(minimum); + } + + void OutputVariable::setMaximum(scalar maximum) { + Variable::setMaximum(maximum); + this->_fuzzyOutput->setMaximum(maximum); + } + + void OutputVariable::setDefuzzifier(Defuzzifier* defuzzifier) { + this->_defuzzifier.reset(defuzzifier); + } + + Defuzzifier* OutputVariable::getDefuzzifier() const { + return this->_defuzzifier.get(); + } + + void OutputVariable::setOutputValue(scalar outputValue) { + this->_outputValue = outputValue; + } + + scalar OutputVariable::getOutputValue() const { + return this->_outputValue; + } + + void OutputVariable::setPreviousOutputValue(scalar previousOutputValue) { + this->_previousOutputValue = previousOutputValue; + } + + scalar OutputVariable::getPreviousOutputValue() const { + return this->_previousOutputValue; + } + + void OutputVariable::setDefaultValue(scalar defaultValue) { + this->_defaultValue = defaultValue; + } + + scalar OutputVariable::getDefaultValue() const { + return this->_defaultValue; + } + + void OutputVariable::setLockOutputValueInRange(bool lockOutputValueInRange) { + this->_lockOutputValueInRange = lockOutputValueInRange; + } + + bool OutputVariable::isLockedOutputValueInRange() const { + return this->_lockOutputValueInRange; + } + + void OutputVariable::setLockPreviousOutputValue(bool lockPreviousOutputValue) { + this->_lockPreviousOutputValue = lockPreviousOutputValue; + } + + bool OutputVariable::isLockedPreviousOutputValue() const { + return this->_lockPreviousOutputValue; + } + + void OutputVariable::defuzzify() { + if (fl::Op::isFinite(this->_outputValue)) { + this->_previousOutputValue = this->_outputValue; + } + + scalar result = fl::nan; + bool isValid = this->_enabled and not this->_fuzzyOutput->isEmpty(); + if (isValid) { + if (not _defuzzifier.get()) { + throw fl::Exception("[defuzzifier error] " + "defuzzifier needed to defuzzify output variable <" + _name + ">", FL_AT); + } + result = this->_defuzzifier->defuzzify(this->_fuzzyOutput.get(), _minimum, _maximum); + } else { + //if a previous defuzzification was successfully performed and + //and the output value is supposed not to change when the output is empty + if (_lockPreviousOutputValue and not Op::isNaN(_previousOutputValue)) { + result = _previousOutputValue; + } else { + result = _defaultValue; + } + } + + if (_lockOutputValueInRange) { + result = fl::Op::bound(result, _minimum, _maximum); + } + + this->_outputValue = result; + } + + std::string OutputVariable::fuzzyOutputValue() const { + std::ostringstream ss; + for (std::size_t i = 0; i < _terms.size(); ++i) { + scalar degree = _fuzzyOutput->activationDegree(_terms.at(i)); + if (i == 0) { + ss << fl::Op::str(degree); + } else { + if (fl::Op::isNaN(degree) or fl::Op::isGE(degree, 0.0)) + ss << " + " << fl::Op::str(degree); + else + ss << " - " << fl::Op::str(std::fabs(degree)); + } + ss << "/" << _terms.at(i)->getName(); + } + return ss.str(); + } + + void OutputVariable::clear() { + _fuzzyOutput->clear(); + setPreviousOutputValue(fl::nan); + setOutputValue(fl::nan); + } + + std::string OutputVariable::toString() const { + return FllExporter().toString(this); + } + +} |