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Oxigen Changelog

2.2.2 - 2021/02/28

  • Special case for single crosspoint and multicrosspoint with individuals of length 1 interchanging it with a random position of the other individual.
  • Interchange random positions in uniform cross instead of always even ones.

2.2.1 - 2021/02/27

  • Fix uniform cross function with different length individuals.

2.2.0 - 2021/01/09

  • Better population refitness taking into account the age effect but not the refitness of previous generations (in previous versions the original fitness was taken instead).
  • Fix niches formula: 1.0 - (d / sigma.0).powf(alfa.0) instead of (1.0 - (d / sigma.0)).powf(alfa.0).
  • Historical of solutions instead of checking only the current generation.
  • Improve performance of getting fitnesses and solutions using a normal iterator instead of a parallel one.

2.1.4 - 2021/02/28

  • Special case for single crosspoint and multicrosspoint with individuals of length 1 interchanging it with a random position of the other individual.
  • Interchange random positions in uniform cross instead of always even ones.

2.1.3 - 2021/02/27

  • Fix uniform cross function with different length individuals.

2.1.2 - 2020/01/13

  • Better implementation of niches when m is 0.

2.1.1 - 2021/01/09

  • Fix niches formula: 1.0 - (d / sigma.0).powf(alfa.0) instead of (1.0 - (d / sigma.0)).powf(alfa.0).

2.1.0 - 2020/01/19

  • Optional global cache as global_cache feature.

2.0.6 - 2021/02/28

  • Special case for single crosspoint and multicrosspoint with individuals of length 1 interchanging it with a random position of the other individual.
  • Interchange random positions in uniform cross instead of always even ones.

2.0.5 - 2021/02/27

  • Fix uniform cross function with different length individuals.

2.0.4 - 2020/01/13

  • Better implementation of niches when m is 0.

2.0.3 - 2021/01/09

  • Fix niches formula: 1.0 - (d / sigma.0).powf(alfa.0) instead of (1.0 - (d / sigma.0)).powf(alfa.0).

2.0.2 - 2019/10/18

  • Better default distance function taking into account individuals of different length.

2.0.1 - 2019/10/18

  • Make public ind and fitness attributes of IndWithFitness struct.

2.0.0 - 2019/09/28

  • More flexibility allowing any struct with a Vec inside can implement Genotype. In 1.x versions this was not possible because Genotype had to implement FromIterator. In 2 versions a from_iter function has been added instead.
  • Oxigen 2 fix the issue #3 ('Cuadratic' has been replaced by 'Quadratic' in built-in enums). This has not been fixed in 1 versions to not break the interface.
  • The fix function in Genotype returns a boolean to specify if the individual has been changed to recompute its fitness.
  • The number of solutions gotten in each generation is now the number of different solutions using the new distance function of Genotype.
  • The u16 type has been changed to usize in StopCriterion, MutationRate and SelectionRate traits.
  • PopulationRefitness trait has been added to optionally refit the individuals of the population comparing them to the other individuals. Niches built-in PopulationRefitness function has been added.
  • The SurvivalPressure trait has been redefined and now it kills the individuals instead of returning the indexes to remove. It also receives a list with the pairs of parents and children of the generation.
  • Many SurvivalPressure built-in functions have been added, like Overpopulation, CompetitiveOverpopulation, DeterministicOverpopulation, ChildrenFightParents, ChildrenFightMostSimilar, etc.
  • The two previous additions allow to search different solutions in different search space areas in order to avoid local suboptimal solutions and find different solutions.
  • Other minor improvements.

1.5.2 - 2021/02/28

  • Special case for single crosspoint and multicrosspoint with individuals of length 1 interchanging it with a random position of the other individual.
  • Interchange random positions in uniform cross instead of always even ones.

1.5.1 - 2021/02/27

  • Fix uniform cross function with different length individuals.

1.5.0 - 2019/08/24

  • Multipoint and uniform cross functions.

1.4.3 - 2019/07/22

  • Fix error in tournaments that did select individuals from 0 to the selection rate instead of the entire population.

1.4.2 - 2019/01/13

  • Fix that the age unfitness was not applied to the fitness.

1.4.1 - 2019/01/06

  • Fix that cross points cannot be 0, since it generates children identical to parents.

1.4.0 - 2019/01/01

  • Fix that the age was not incremented in each generation.
  • The progress is NaN at the first generation also in MutationRate and SelectionRate.

1.3.0 - 2018/12/27

  • Fix empty fitnesses at the first generation sent to StopCriterion, MutationRate and SelectionRate.
  • Add GenerationAndProgress, MaxFitness, MinFitness and AvgFitness built-in stop criteria.

1.2.1 - 2018/12/27

  • Fix survival pressure Worst, that was reducing population size to a half.

1.2.0 - 2018/12/26

  • Add fix function to Genotype to allow to repair individuals to satisfy restrictions.
  • SolutionsFound stop criterion added to specify the desired number of solutions.
  • Progress stop criterion fixed (it was stopping always at iteration 0).
  • Improved populations output.

1.1.0 - 2018/08/20

  • Permit initial individuals enabling to resume previous executions and coevolution.

1.0 - 2018/08/20

  • First version.