Class: Rastrigin

Inherits:
Object
  • Object
show all
Defined in:
lib/gimuby/problem/rastrigin/rastrigin.rb

Overview

en.wikipedia.org/wiki/Rastrigin_function

Instance Method Summary collapse

Instance Method Details

#evaluate(x_values) ⇒ Object

Returns Float.

Parameters:

  • x_values (Array<Float>)

Returns:

  • Float



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# File 'lib/gimuby/problem/rastrigin/rastrigin.rb', line 6

def evaluate(x_values)
  a = get_a
  value = a * x_values.length
  x_values.each do |x_i|
    cos_arg = 2.0 * Math::PI * x_i
    sum_term_1 = (x_i ** 2.0)
    sum_term_2 = a * Math::cos(cos_arg)
    value += sum_term_1 - sum_term_2
  end
  value
end