Griewank

Complexity

Total Complexity

4

Size/Duplication

Total Lines	24
Duplicated Lines	0 %

Importance

Changes	2
Bugs	0	Features	1

3 Methods

Rating	Name	Duplication	Size	Complexity
A	evaluate()	0	14	2
A	function()	0	18	3
A	__init__()	0	3	1

"""Implementation of Griewank function."""
import math

__all__ = ['Griewank']


class Griewank(object):

    def __init__(self, Lower=-100, Upper=100):
        self.Lower = Lower
        self.Upper = Upper

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

            val = 0.0
            val1 = 0.0
            val2 = 1.0

            for i in range(D):
                val1 = val1 + math.pow(sol[i], 2)
                val2 = val2 + \
                    math.cos((((sol[i]) / math.sqrt(i + 1)) * math.pi) / 180)

            val = (1 / 4000) * val1 - val2 + 1

            return val

        return evaluate