Griewank.function()

Complexity

Conditions

3

Size

Total Lines

18

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	1

1 Method

Rating	Name	Duplication	Size	Complexity
A	Griewank.evaluate()	0	14	2

"""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