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Updated commenting and removed old survivor selection method

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Updated commenting and removed old survivor selection method
This commit is contained in:
RyleyGG
2020-10-12 16:11:41 -04:00
parent 94d7c52666
commit 96a1177a67
1 changed files with 6 additions and 27 deletions
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33
src/survivor_selection/survivor_selection_methods.py
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@ -7,36 +7,15 @@ from initialization.chromosome_structure.chromosome import Chromosome
class Survivor_Selection:
"""Survivor selection determines which individuals should be brought to the next generation"""
""" Pretty sure this isn't actually survivor selection - seems like its 'cheating'
def repeated_crossover(ga, next_population):
while len(next_population.get_all_chromosomes()) < ga.population_size:
crossover_pool = ga.population.mating_pool
split_point = random.randint(0,ga.chromosome_length)
chromosome_list = []
for i in range(len(crossover_pool)):
if i + 1 < len(crossover_pool):
new_gene_set = []
parent_one = crossover_pool[i].get_genes()
parent_two = crossover_pool[i+1].get_genes()
new_gene_set.extend(parent_one[0:split_point])
new_gene_set.extend(parent_two[split_point:])
new_chromosome = create_chromosome(new_gene_set)
chromosome_list.append(new_chromosome)
for i in range(len(chromosome_list)):
next_population.add_chromosome(chromosome_list[i])
if len(next_population.get_all_chromosomes()) >= ga.population_size:
break
return next_population
"""
"""Will bring all but the worst-performing chromosomes from the current generation"""
"""The exact number of chromosomes removed depends on how many offspring were generated by parent selection"""
def remove_worst(ga, next_population):
"""
Will bring all but the worst-performing chromosomes from the current generation.
The exact number of chromosomes removed depends on how many offspring were generated by parent selection.
"""
iterator = 0
# While the size of the next population is less than it should be (as determined by the user)
while len(next_population.get_all_chromosomes()) < ga.population_size:
# Add the best chromosome from the current population that hasn't already been brought over
next_population.add_chromosome(ga.population.get_all_chromosomes()[iterator])
iterator += 1
return next_population