Class: Operator::MutationAltering

Inherits:
MutationAlteringCore show all
Defined in:
../lib/mutation_altering.rb

Overview

Common functionality for MutationNodal and MutationStructural classes. Select the random (nodal/structural filtered) position within the orig vector and mutate it. The resultant value (of a mutated codon) is a random number in the range 0..magnitude. Return the mutated copy of the orig. genotype. track argument is the hint (symbols atteched to positions) obtained from Mapper::Base#track_support

Direct Known Subclasses

MutationNodal, MutationStructural

Instance Attribute Summary (collapse)

Attributes inherited from MutationAlteringCore

#offset

Instance Method Summary (collapse)

Methods inherited from MutationAlteringCore

#mutation

Constructor Details

- (MutationAltering) initialize(grammar, magnitude = nil)

Create the mutation operator. grammar is the valid grammar for distinguishing :structural and :nodal symbols magnitude is the initial value of the MutationAltering#magnitude attribute 



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# File '../lib/mutation_altering.rb', line 107

def initialize( grammar, magnitude=nil )
  super(grammar)
  @magnitude = magnitude
end

Instance Attribute Details

- (Object) magnitude

The maximal possible value of the mutaton plus 1. If not specified, the maximal value over the original genotype values is used. 



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# File '../lib/mutation_altering.rb', line 117

def magnitude
  @magnitude
end

- (Object) random

The source of randomness, used for calling “random.rand( limit )”, defaulting to ‘Kernel’ class. 



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# File '../lib/mutation_altering.rb', line 113

def random
  @random
end