1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/*
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/term/SigmoidProduct.h"
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) {
}
SigmoidProduct::~SigmoidProduct() {
}
std::string SigmoidProduct::className() const {
return "SigmoidProduct";
}
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;
}
std::string SigmoidProduct::parameters() const {
return Op::join(4, " ", _left, _rising, _falling, _right) +
(not Op::isEq(_height, 1.0) ? " " + Op::str(_height) : "");
}
void SigmoidProduct::configure(const std::string& parameters) {
if (parameters.empty()) return;
std::vector<std::string> values = Op::split(parameters, " ");
std::size_t required = 4;
if (values.size() < required) {
std::ostringstream ex;
ex << "[configuration error] term <" << className() << ">"
<< " requires <" << required << "> parameters";
throw fl::Exception(ex.str(), FL_AT);
}
setLeft(Op::toScalar(values.at(0)));
setRising(Op::toScalar(values.at(1)));
setFalling(Op::toScalar(values.at(2)));
setRight(Op::toScalar(values.at(3)));
if (values.size() > required)
setHeight(Op::toScalar(values.at(required)));
}
void SigmoidProduct::setRising(scalar risingSlope) {
this->_rising = risingSlope;
}
scalar SigmoidProduct::getRising() const {
return this->_rising;
}
void SigmoidProduct::setLeft(scalar leftInflection) {
this->_left = leftInflection;
}
scalar SigmoidProduct::getLeft() const {
return this->_left;
}
void SigmoidProduct::setRight(scalar rightInflection) {
this->_right = rightInflection;
}
scalar SigmoidProduct::getRight() const {
return this->_right;
}
void SigmoidProduct::setFalling(scalar fallingSlope) {
this->_falling = fallingSlope;
}
scalar SigmoidProduct::getFalling() const {
return this->_falling;
}
SigmoidProduct* SigmoidProduct::clone() const {
return new SigmoidProduct(*this);
}
Term* SigmoidProduct::constructor() {
return new SigmoidProduct;
}
}
|
