Class: Foxholes

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

Overview

Implementation according to www.sfu.ca/~ssurjano/shekel.html www.zsd.ict.pwr.wroc.pl/files/docs/functions.pdf

Constant Summary collapse

@@x_value_min = 
-65536
@@x_value_max = 
65536

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Foxholes

Returns a new instance of Foxholes.



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# File 'lib/gimuby/problem/foxholes/foxholes.rb', line 12

def initialize
  ensure_holes_coordinates
end

Instance Method Details

#evaluate(x_values) ⇒ Object 



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# File 'lib/gimuby/problem/foxholes/foxholes.rb', line 16

def evaluate(x_values)
  sum = 0.0
  get_number_holes.times do |j|
    hole_coordinate = @holes_coordinates[j]
    sub_sum = 0.10
    hole_coordinate.each_index do |i|
      sub_sum += (x_values[i].to_f - hole_coordinate[i]) ** 2
    end
    sum += 1.0 / sub_sum
  end
  sum
end