Class: MuLambda

Inherits:

AlgorithmBase

• Object
• AlgorithmBase
• MuLambda

show all

Includes:

Breed, Elitism

Defined in:

../algorithm/mu_lambda.rb

Instance Attribute Summary (collapse)

• - (Object) comma_or_plus

  Returns the value of attribute comma_or_plus.

• - (Object) lambda_size

  Returns the value of attribute lambda_size.

Attributes included from Breed

#inject

Attributes included from Elitism

#elite_size

Attributes inherited from AlgorithmBase

#init, #population_size, #probabilities, #termination

Instance Method Summary (collapse)

• - (Object) setup(config)
• - (Object) step

Methods inherited from AlgorithmBase

#finished?, #teardown

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# File '../algorithm/mu_lambda.rb', line 11

def comma_or_plus
  @comma_or_plus
end

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# File '../algorithm/mu_lambda.rb', line 11

def lambda_size
  @lambda_size
end

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# File '../algorithm/mu_lambda.rb', line 13

def setup config
  super
  raise "MuLambda: lambda_size < population_size" if @comma_or_plus == 'comma' and @lambda_size < @population_size
  @population = load_or_init( @store, @population_size )   
  init_elitism @population_size
  @report.next    
  return @report    
end

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# File '../algorithm/mu_lambda.rb', line 22

def step
  @report.next    
  @report << "--------- step #{@steps += 1}" 
  @report.report @population

  lambda_population = breed_population( Util.permutate( @population ), @lambda_size )
  elite_population = elite @population

  lambda_population.concat @population if @comma_or_plus == 'plus'

  @population = @selection.select( @population_size - elite_population.size, lambda_population )
  @population.concat elite_population

  return @report
end