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 07:44 UTC

Rastrigin.function() A

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Complexity

Conditions

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Total Lines

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Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	1

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

"""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			"""Implementation of Rastrigin benchmark function.
			0 ignored issues – show Bug introduced 2018-02-15 07:45 UTC by Report Bug Copy Issue Report A suspicious escape sequence `\s` was found. Did you maybe forget to add an `r` prefix? Escape sequences in Python are generally interpreted according to rules similar to standard C. Only if strings are prefixed with `r` or `R` are they interpreted as regular expressions. The escape sequence that was used indicates that you might have intended to write a regular expression. Learn more about the available escape sequences. in the Python documentation. Loading history... Bug introduced 2018-02-15 07:45 UTC by Report Bug Copy Issue Report A suspicious escape sequence `\p` was found. Did you maybe forget to add an `r` prefix? Escape sequences in Python are generally interpreted according to rules similar to standard C. Only if strings are prefixed with `r` or `R` are they interpreted as regular expressions. The escape sequence that was used indicates that you might have intended to write a regular expression. Learn more about the available escape sequences. in the Python documentation. Loading history... Bug introduced 2018-02-15 07:45 UTC by Report Bug Copy Issue Report A suspicious escape sequence `\e` was found. Did you maybe forget to add an `r` prefix? Escape sequences in Python are generally interpreted according to rules similar to standard C. Only if strings are prefixed with `r` or `R` are they interpreted as regular expressions. The escape sequence that was used indicates that you might have intended to write a regular expression. Learn more about the available escape sequences. in the Python documentation. Loading history... Bug introduced 2018-02-15 07:45 UTC by Report Bug Copy Issue Report A suspicious escape sequence `\l` was found. Did you maybe forget to add an `r` prefix? Escape sequences in Python are generally interpreted according to rules similar to standard C. Only if strings are prefixed with `r` or `R` are they interpreted as regular expressions. The escape sequence that was used indicates that you might have intended to write a regular expression. Learn more about the available escape sequences. in the Python documentation. Loading history...
2
3			Date: 2018
4
5			Authors: Lucija Brezočnik and Iztok Fister Jr.
6
7			License: MIT
8
9			Function: Rastrigin function
10
11			Input domain:
12			The function can be defined on any input domain but it is usually
13			evaluated on the hypercube x_i ∈ [-5.12, 5.12], for all i = 1, 2,..., D.
14
15			Global minimum:
16			f(x) = 0, at x = (0,...,0)
17
18			LaTeX formats:
19			Inline: $f(x) = 10D + \sum_{i=1}^D (x_i^2 -10cos(2\pi x_i))$
20			Equation: \begin{equation}
21			f(x) = 10D + \sum_{i=1}^D (x_i^2 -10cos(2\pi x_i))
22			\end{equation}
23			Domain: $-5.12 \leq x_i \leq 5.12$
24
25			Reference: https://www.sfu.ca/~ssurjano/rastr.html
26			"""
27
28			import math
29
30			__all__ = ['Rastrigin']
31
32
33			class Rastrigin(object):
34
35			def __init__(self, Lower=-5.12, Upper=5.12):
36			self.Lower = Lower
37			self.Upper = Upper
38
39			@classmethod
40			def function(cls):
41			def evaluate(D, sol):
42
			0 ignored issues – show Coding Style introduced 2018-02-15 07:45 UTC by Report Bug Copy Issue Report Trailing whitespace Loading history...
43			val = 0.0
44
45			for i in range(D):
46			val += math.pow(sol[i], 2) - (10 * math.cos(2 * math.pi * sol[i]))
47
48			return 10 * D + val
49
50			return evaluate
51

NiaOrg / NiaPy

Pull Request — master (#32)

Rastrigin.function() A

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