Rastrigin.function() - Code Metrics - Inspection of "Feature functions2" - NiaOrg/NiaPy - Measure and Improve Code Quality continuously with Scrutinizer

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Pull Request — master (#32)

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created 2018-02-15 07:52 UTC

Rastrigin.function() A

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dl	0
loc	13
rs	9.4285
c	1
b	0
f	1
cc	3

# encoding=utf8
# pylint: disable=anomalous-backslash-in-string
"""Implementation of Rastrigin benchmark function.

Date: 2018

Authors: Lucija Brezočnik and Iztok Fister Jr.

License: MIT

Function: Rastrigin function

Input domain:
    The function can be defined on any input domain but it is usually
    evaluated on the hypercube x_i ∈ [-5.12, 5.12], for all i = 1, 2,..., D.

Global minimum:
    f(x*) = 0, at x* = (0,...,0)

LaTeX formats:
    Inline: $f(x) = 10D + \sum_{i=1}^D (x_i^2 -10cos(2\pi x_i))$
    Equation: \begin{equation}
              f(x) = 10D + \sum_{i=1}^D (x_i^2 -10cos(2\pi x_i))
              \end{equation}
    Domain: $-5.12 \leq x_i \leq 5.12$

Reference: https://www.sfu.ca/~ssurjano/rastr.html
"""

import math

__all__ = ['Rastrigin']


class Rastrigin(object):

    def __init__(self, Lower=-5.12, Upper=5.12):
        self.Lower = Lower
        self.Upper = Upper

    @classmethod
    def function(cls):
        def evaluate(D, sol):

            val = 0.0

            for i in range(D):
                val += math.pow(sol[i], 2) - (10 * math.cos(2 * math.pi * sol[i]))

            return 10 * D + val

        return evaluate


1			# encoding=utf8
2			# pylint: disable=anomalous-backslash-in-string
3			"""Implementation of Rastrigin benchmark function.
4
5			Date: 2018
6
7			Authors: Lucija Brezočnik and Iztok Fister Jr.
8
9			License: MIT
10
11			Function: Rastrigin function
12
13			Input domain:
14			The function can be defined on any input domain but it is usually
15			evaluated on the hypercube x_i ∈ [-5.12, 5.12], for all i = 1, 2,..., D.
16
17			Global minimum:
18			f(x) = 0, at x = (0,...,0)
19
20			LaTeX formats:
21			Inline: $f(x) = 10D + \sum_{i=1}^D (x_i^2 -10cos(2\pi x_i))$
22			Equation: \begin{equation}
23			f(x) = 10D + \sum_{i=1}^D (x_i^2 -10cos(2\pi x_i))
24			\end{equation}
25			Domain: $-5.12 \leq x_i \leq 5.12$
26
27			Reference: https://www.sfu.ca/~ssurjano/rastr.html
28			"""
29
30			import math
31
32			__all__ = ['Rastrigin']
33
34
35			class Rastrigin(object):
36
37			def __init__(self, Lower=-5.12, Upper=5.12):
38			self.Lower = Lower
39			self.Upper = Upper
40
41			@classmethod
42			def function(cls):
43			def evaluate(D, sol):
44
45			val = 0.0
46
47			for i in range(D):
48			val += math.pow(sol[i], 2) - (10 * math.cos(2 * math.pi * sol[i]))
49
50			return 10 * D + val
51
52			return evaluate
53

NiaOrg / NiaPy

Pull Request — master (#32)

Rastrigin.function() A

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