Class: SubPopulation

Inherits:
Object
  • Object
show all
Defined in:
../algorithm/age_hierarchy_tree.rb

Constant Summary

@@left_right = 
0

Instance Attribute Summary (collapse)

Class Method Summary (collapse)

Instance Method Summary (collapse)

Constructor Details

- (SubPopulation) initialize(parent = nil)

A new instance of SubPopulation 



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# File '../algorithm/age_hierarchy_tree.rb', line 16

def initialize( parent=nil )
  @parent = parent
  @name = parent.nil? ? 'R' : "#{parent.name}#{@@left_right=1-@@left_right}"       
  restart
  @@algo.report << "#{@name}.initialize"
end

Instance Attribute Details

- (Object) children

Returns the value of attribute children 



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# File '../algorithm/age_hierarchy_tree.rb', line 7

def children
  @children
end

- (Object) current

Returns the value of attribute current 



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# File '../algorithm/age_hierarchy_tree.rb', line 7

def current
  @current
end

- (Object) level

Returns the value of attribute level 



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# File '../algorithm/age_hierarchy_tree.rb', line 7

def level
  @level
end

- (Object) name (readonly)

Returns the value of attribute name 



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# File '../algorithm/age_hierarchy_tree.rb', line 8

def name
  @name
end

- (Object) parent (readonly)

Returns the value of attribute parent 



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# File '../algorithm/age_hierarchy_tree.rb', line 8

def parent
  @parent
end

Class Method Details

+ (Object) set_algo(algo) 



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# File '../algorithm/age_hierarchy_tree.rb', line 10

def SubPopulation.set_algo algo
  @@algo = algo
end

Instance Method Details

- (Object) breed 



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# File '../algorithm/age_hierarchy_tree.rb', line 40

def breed
  parents = @current.clone
  parents.concat @parent.current unless @parent.nil?
  
  parent_inc = 0
  @@algo.breeding( parents ).each do |offspring|
    if offspring.layer == @level or @parent.nil?
      @children << offspring
    else
      @parent.children << offspring
      parent_inc += 1
    end
  end
  @@algo.report << "#{@name}.breed parents=#{parents.size} -> self.children=#{@children.size} +@parent.children=#{parent_inc}"      
end

- (Object) environmental 



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# File '../algorithm/age_hierarchy_tree.rb', line 56

def environmental

  uniq = Set.new
  elite = [] 

  # elitism   
  copy_size = @@algo.deme_size - @children.size # copy the best of @current if there is not enough children
  copy_size = @@algo.elite_size if copy_size < @@algo.elite_size # but at least elite_size of them
  @current.slice( 0 ... copy_size ).each do |individual| # assuming @current is sorted
    copy = individual.clone
    copy.parents individual   # increment age
    elite << copy
    uniq << copy.phenotype unless uniq.include? copy.phenotype 
  end

  # phenotype duplicate elimination
  offspring = []
  @children.each do |i| 
    next if uniq.include? i.phenotype 
    offspring << i
    uniq << i.phenotype
  end

  # concat, sort, truncate
  @current = @@algo.sort_spea2( elite + offspring ).slice( 0 ... @@algo.deme_size )

  @@algo.report << "#{@name}.environmental pde: #{@children.size} -> #{offspring.size} + copied: #{elite.size} => #{elite.size + offspring.size} truncated: #{@current.size}"        

  @children = []   

end

- (Object) restart 



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# File '../algorithm/age_hierarchy_tree.rb', line 23

def restart
  unless !defined?(@current) or @current.empty? or @parent.nil?
    @current.slice( 0 ... @@algo.elite_size ).each do |individual|
      copy = individual.clone
      copy.parents individual   # increment age
      @parent.children << copy
    end

    @@algo.report << "#{@name}.restart saved elite to #{@parent.name}.children"
  end

  @current = @@algo.sort_spea2( @@algo.init_deme )
  @children = []
  @level = 0
  @@algo.report << "#{@name}.restart @current.size=#{@current.size}"   
end