Package org.apache.commons.math3.genetics

Class OrderedCrossover<T>

java.lang.Object
org.apache.commons.math3.genetics.OrderedCrossover<T>
Type Parameters:
T - generic type of the AbstractListChromosomes for crossover
All Implemented Interfaces:
CrossoverPolicy
public class OrderedCrossover<T> extends Object implements CrossoverPolicy
Order 1 Crossover [OX1] builds offspring from ordered chromosomes by copying a consecutive slice from one parent, and filling up the remaining genes from the other parent as they appear.

This policy works by applying the following rules:

  1. select a random slice of consecutive genes from parent 1
  2. copy the slice to child 1 and mark out the genes in parent 2
  3. starting from the right side of the slice, copy genes from parent 2 as they appear to child 1 if they are not yet marked out.

Example (random sublist from index 3 to 7, underlined): 

 p1 = (8 4 7 3 6 2 5 1 9 0)   X   c1 = (0 4 7 3 6 2 5 1 8 9)
             ---------                        ---------
 p2 = (0 1 2 3 4 5 6 7 8 9)   X   c2 = (8 1 2 3 4 5 6 7 9 0)

This policy works only on AbstractListChromosome, and therefore it is parameterized by T. Moreover, the chromosomes must have same lengths.

Since:
3.1
See Also: