Class: EvoSynth::Recombinations::ArithmeticCrossover

Inherits:
Object
  • Object
show all
Defined in:
lib/evosynth/operators/recombinations/arithmetic_crossover.rb

Overview

ARITHMETISCHER-CROSSOVER (Weicker page 83)

ATTENTION PLEASE! needs interpolation method to work:

interpolation_method.call(gene_one, gene_two, factor)

Constant Summary collapse

INTERPOLATE_NUMBERS =

TODO: add extrapolation and other useful stuff here!

lambda { |gene_one, gene_two, factor| factor * gene_one + (1.0 - factor) * gene_two }
INTERPOLATE_BOOLEANS = 
lambda { |gene_one, gene_two, factor| EvoSynth.rand < factor ? gene_one : gene_two }
EXTRAPOLATE_NUMBERS = 
lambda { |gene_one, gene_two, factor| EvoSynth.rand_bool ? gene_one + factor * gene_two : gene_two + factor * gene_one}

Instance Method Summary collapse

Constructor Details

#initialize(interpolation_function) ⇒ ArithmeticCrossover

Returns a new instance of ArithmeticCrossover.



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# File 'lib/evosynth/operators/recombinations/arithmetic_crossover.rb', line 41

def initialize(interpolation_function)
	@interpolation_function = interpolation_function
end

Instance Method Details

#recombine(individual_one, individual_two) ⇒ Object 



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# File 'lib/evosynth/operators/recombinations/arithmetic_crossover.rb', line 45

def recombine(individual_one, individual_two)
	child_one = individual_one.deep_clone
	child_two = individual_two.deep_clone

	shorter = EvoSynth::Recombinations.individual_with_shorter_genome(individual_one, individual_two)
	shorter.genome.each_with_index do |gene_one, index|
		gene_two = individual_two.genome[index]

		child_one.genome[index] = @interpolation_function.call(gene_one, gene_two, EvoSynth.rand)
		child_two.genome[index] = @interpolation_function.call(gene_two, gene_one, EvoSynth.rand)
	end

	[child_one, child_two]
end

#to_s ⇒ Object 



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# File 'lib/evosynth/operators/recombinations/arithmetic_crossover.rb', line 60

def to_s
	"arithmetic crossover"
end