for testing and deploying your application
for finding and fixing issues
for empowering human code reviews
# 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
NiaOrg /
NiaPy
