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Diffstat (limited to 'fuzzylite/src/term/Bell.cpp')
-rw-r--r-- | fuzzylite/src/term/Bell.cpp | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/fuzzylite/src/term/Bell.cpp b/fuzzylite/src/term/Bell.cpp new file mode 100644 index 0000000..bd63753 --- /dev/null +++ b/fuzzylite/src/term/Bell.cpp @@ -0,0 +1,93 @@ +/* + fuzzylite (R), a fuzzy logic control library in C++. + Copyright (C) 2010-2017 FuzzyLite Limited. All rights reserved. + Author: Juan Rada-Vilela, Ph.D. <jcrada@fuzzylite.com> + + This file is part of fuzzylite. + + fuzzylite is free software: you can redistribute it and/or modify it under + the terms of the FuzzyLite License included with the software. + + You should have received a copy of the FuzzyLite License along with + fuzzylite. If not, see <http://www.fuzzylite.com/license/>. + + fuzzylite is a registered trademark of FuzzyLite Limited. + */ + +#include "fl/term/Bell.h" + +namespace fl { + + Bell::Bell(const std::string& name, scalar center, scalar width, scalar slope, scalar height) + : Term(name, height), _center(center), _width(width), _slope(slope) { } + + Bell::~Bell() { } + + std::string Bell::className() const { + return "Bell"; + } + + Complexity Bell::complexity() const { + return Complexity().comparison(1).arithmetic(6).function(2); + } + + scalar Bell::membership(scalar x) const { + if (Op::isNaN(x)) return fl::nan; + return Term::_height * (1.0 / (1.0 + std::pow(std::abs((x - _center) / _width), 2.0 * _slope))); + } + + std::string Bell::parameters() const { + return Op::join(3, " ", _center, _width, _slope) + + (not Op::isEq(getHeight(), 1.0) ? " " + Op::str(getHeight()) : ""); + } + + void Bell::configure(const std::string& parameters) { + if (parameters.empty()) return; + std::vector<std::string> values = Op::split(parameters, " "); + std::size_t required = 3; + if (values.size() < required) { + std::ostringstream ex; + ex << "[configuration error] term <" << className() << ">" + << " requires <" << required << "> parameters"; + throw Exception(ex.str(), FL_AT); + } + setCenter(Op::toScalar(values.at(0))); + setWidth(Op::toScalar(values.at(1))); + setSlope(Op::toScalar(values.at(2))); + if (values.size() > required) + setHeight(Op::toScalar(values.at(required))); + } + + void Bell::setWidth(scalar a) { + this->_width = a; + } + + scalar Bell::getWidth() const { + return this->_width; + } + + void Bell::setSlope(scalar b) { + this->_slope = b; + } + + scalar Bell::getSlope() const { + return this->_slope; + } + + void Bell::setCenter(scalar c) { + this->_center = c; + } + + scalar Bell::getCenter() const { + return this->_center; + } + + Bell* Bell::clone() const { + return new Bell(*this); + } + + Term* Bell::constructor() { + return new Bell; + } + +} |