diff options
Diffstat (limited to 'fuzzylite/src/term/SigmoidProduct.cpp')
-rw-r--r-- | fuzzylite/src/term/SigmoidProduct.cpp | 43 |
1 files changed, 19 insertions, 24 deletions
diff --git a/fuzzylite/src/term/SigmoidProduct.cpp b/fuzzylite/src/term/SigmoidProduct.cpp index 9e43ac9..5f35750 100644 --- a/fuzzylite/src/term/SigmoidProduct.cpp +++ b/fuzzylite/src/term/SigmoidProduct.cpp @@ -1,25 +1,17 @@ /* - Author: Juan Rada-Vilela, Ph.D. - Copyright (C) 2010-2014 FuzzyLite Limited - All rights reserved + 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 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. + the terms of the FuzzyLite License included with the software. - 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. + 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/SigmoidProduct.h" @@ -29,25 +21,28 @@ namespace fl { SigmoidProduct::SigmoidProduct(const std::string& name, scalar left, scalar rising, scalar falling, scalar right, scalar height) - : Term(name, height), _left(left), _rising(rising), _falling(falling), _right(right) { - } + : Term(name, height), _left(left), _rising(rising), _falling(falling), _right(right) { } - SigmoidProduct::~SigmoidProduct() { - } + SigmoidProduct::~SigmoidProduct() { } std::string SigmoidProduct::className() const { return "SigmoidProduct"; } + Complexity SigmoidProduct::complexity() const { + return Complexity().comparison(1).arithmetic(2 + 4 + 4).function(2); + } + scalar SigmoidProduct::membership(scalar x) const { - scalar a = 1.0 / (1 + std::exp(-_rising * (x - _left))); - scalar b = 1.0 / (1 + std::exp(-_falling * (x - _right))); - return _height * a * b; + if (Op::isNaN(x)) return fl::nan; + const scalar a = 1.0 + std::exp(-_rising * (x - _left)); + const scalar b = 1.0 + std::exp(-_falling * (x - _right)); + return Term::_height * 1.0 / (a * b); } std::string SigmoidProduct::parameters() const { return Op::join(4, " ", _left, _rising, _falling, _right) + - (not Op::isEq(_height, 1.0) ? " " + Op::str(_height) : ""); + (not Op::isEq(getHeight(), 1.0) ? " " + Op::str(getHeight()) : ""); } void SigmoidProduct::configure(const std::string& parameters) { @@ -58,7 +53,7 @@ namespace fl { std::ostringstream ex; ex << "[configuration error] term <" << className() << ">" << " requires <" << required << "> parameters"; - throw fl::Exception(ex.str(), FL_AT); + throw Exception(ex.str(), FL_AT); } setLeft(Op::toScalar(values.at(0))); setRising(Op::toScalar(values.at(1))); |