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Diffstat (limited to 'fuzzylite/src/term/ZShape.cpp')
-rw-r--r-- | fuzzylite/src/term/ZShape.cpp | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/fuzzylite/src/term/ZShape.cpp b/fuzzylite/src/term/ZShape.cpp new file mode 100644 index 0000000..86668b6 --- /dev/null +++ b/fuzzylite/src/term/ZShape.cpp @@ -0,0 +1,102 @@ +/* + 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/ZShape.h" + +namespace fl { + + ZShape::ZShape(const std::string& name, scalar start, scalar end, scalar height) + : Term(name, height), _start(start), _end(end) { + } + + ZShape::~ZShape() { + } + + std::string ZShape::className() const { + return "ZShape"; + } + + scalar ZShape::membership(scalar x) const { + if (fl::Op::isNaN(x)) return fl::nan; + //from Octave zmf.m + scalar average = (_start + _end) / 2; + scalar difference = _end - _start; + + if (Op::isLE(x, _start)) return _height * 1.0; + + if (Op::isLE(x, average)) + return _height * (1.0 - 2.0 * std::pow((x - _start) / difference, 2)); + + if (Op::isLt(x, _end)) + return _height * (2.0 * std::pow((x - _end) / difference, 2)); + + return _height * 0.0; + } + + std::string ZShape::parameters() const { + return Op::join(2, " ", _start, _end) + + (not Op::isEq(_height, 1.0) ? " " + Op::str(_height) : ""); + } + + void ZShape::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); + } + setStart(Op::toScalar(values.at(0))); + setEnd(Op::toScalar(values.at(1))); + if (values.size() > required) + setHeight(Op::toScalar(values.at(required))); + } + + void ZShape::setStart(scalar start) { + this->_start = start; + } + + scalar ZShape::getStart() const { + return this->_start; + } + + void ZShape::setEnd(scalar end) { + this->_end = end; + } + + scalar ZShape::getEnd() const { + return this->_end; + } + + ZShape* ZShape::clone() const { + return new ZShape(*this); + } + + Term* ZShape::constructor() { + return new ZShape; + } + +} |