diff options
Diffstat (limited to 'fuzzylite/src/term/Cosine.cpp')
-rw-r--r-- | fuzzylite/src/term/Cosine.cpp | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/fuzzylite/src/term/Cosine.cpp b/fuzzylite/src/term/Cosine.cpp new file mode 100644 index 0000000..a1402ad --- /dev/null +++ b/fuzzylite/src/term/Cosine.cpp @@ -0,0 +1,96 @@ +/* + 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/>. + + fuzzyliteâ„¢ is a trademark of FuzzyLite Limited. + + */ + +#include "fl/term/Cosine.h" + +namespace fl { + + Cosine::Cosine(const std::string& name, scalar center, scalar width, scalar height) + : Term(name, height), _center(center), _width(width) { + + } + + Cosine::~Cosine() { + + } + + std::string Cosine::className() const { + return "Cosine"; + } + + std::string Cosine::parameters() const { + return Op::join(2, " ", _center, _width) + + (not Op::isEq(_height, 1.0) ? " " + Op::str(_height) : ""); + } + + void Cosine::configure(const std::string& parameters) { + if (parameters.empty()) return; + std::vector<std::string> values = Op::split(parameters, " "); + std::size_t required = 2; + if (values.size() < required) { + std::ostringstream ex; + ex << "[configuration error] term <" << className() << ">" + << " requires <" << required << "> parameters"; + throw fl::Exception(ex.str(), FL_AT); + } + setCenter(Op::toScalar(values.at(0))); + setWidth(Op::toScalar(values.at(1))); + if (values.size() > required) + setHeight(Op::toScalar(values.at(required))); + + } + + scalar Cosine::membership(scalar x) const { + if (fl::Op::isNaN(x)) return fl::nan; + if (fl::Op::isLt(x, _center - _width / 2.0) + or fl::Op::isGt(x, _center + _width / 2.0)) + return _height * 0.0; + const scalar pi = 4.0 * std::atan(1.0); + return _height * (0.5 * (1.0 + std::cos(2.0 / _width * pi * (x - _center)))); + } + + void Cosine::setCenter(scalar center) { + this->_center = center; + } + + scalar Cosine::getCenter() const { + return this->_center; + } + + void Cosine::setWidth(scalar width) { + this->_width = width; + } + + scalar Cosine::getWidth() const { + return this->_width; + } + + Cosine* Cosine::clone() const { + return new Cosine(*this); + } + + Term* Cosine::constructor() { + return new Cosine; + } +} |