Sphere.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

Sphere.function() A

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Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	1

Metric	Value
dl	0
loc	9
rs	9.6666
c	1
b	0
f	1
cc	3

"""Implementation of Sphere functions.


Date: 2018

Authors: Iztok Fister Jr.

License: MIT

Function: Sphere function

Input domain:
    The function can be defined on any input domain but it is usually
    evaluated on the hypercube x_i ∈ [0, 10], for all i = 1, 2,..., D.

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

LaTeX formats:
    Inline: $f(x) = \sum_{i=1}^D x_i^2$
    Equation: \begin{equation}f(x) = \sum_{i=1}^D x_i^2 \end{equation}
    Domain: $0 \leq x_i \leq 10$

Reference paper:
    Jamil, M., and Yang, X. S. (2013).
    A literature survey of benchmark functions for global optimisation problems.
    International Journal of Mathematical Modelling and Numerical Optimisation,
    4(2), 150-194.
"""

import math

__all__ = ['Sphere']


class Sphere(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)
            return val

        return evaluate


1			"""Implementation of Sphere functions.
			0 ignored issues – show Bug introduced 2018-02-12 19:04 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 2018-02-12 19:04 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 2018-02-12 19:04 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: Iztok Fister Jr.
6
7			License: MIT
8
9			Function: Sphere 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 ∈ [0, 10], for all i = 1, 2,..., D.
14
15			Global minimum:
16			f(x) = 0, at x = (0,...,0)
17
18			LaTeX formats:
19			Inline: $f(x) = \sum_{i=1}^D x_i^2$
20			Equation: \begin{equation}f(x) = \sum_{i=1}^D x_i^2 \end{equation}
21			Domain: $0 \leq x_i \leq 10$
22
23			Reference paper:
24			Jamil, M., and Yang, X. S. (2013).
25			A literature survey of benchmark functions for global optimisation problems.
26			International Journal of Mathematical Modelling and Numerical Optimisation,
27			4(2), 150-194.
28			"""
29
30			import math
31
32			__all__ = ['Sphere']
33
34
35			class Sphere(object):
36			def __init__(self, Lower=-5.12, Upper=5.12):
37			self.Lower = Lower
38			self.Upper = Upper
39
40			@classmethod
41			def function(cls):
42			def evaluate(D, sol):
43			val = 0.0
44			for i in range(D):
45			val += math.pow(sol[i], 2)
46			return val
47
48			return evaluate
49

NiaOrg / NiaPy

Pull Request — master (#32)

Sphere.function() A

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