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Added comments & fixed small bug

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Mostly added comments, but also fixed a small bug in parent selection where the tournament size would be much smaller than it should be.
This commit is contained in:
RyleyGG
2020-10-12 09:23:41 -04:00
parent c3d9ef8bd1
commit 94d7c52666
7 changed files with 50 additions and 46 deletions
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10
src/mutation/mutation_methods.py
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@ -6,13 +6,16 @@ class Mutation_Methods:
pass
def random_mutation(ga, chromosome_set = None):
"""Will take the input population and randomly reset entire chromosomes based on the GA's mutation rate"""
"""Defaulting to the GA's current population if no input is explicitly given"""
if chromosome_set == None:
chromosome_set = ga.population.get_all_chromosomes()
chromosome_mutate_num = int(len(chromosome_set)*ga.mutation_rate)
temp_population = ga.initialization_impl(ga)
"""While more chromosomes need to be mutated, grab a random chromosome and re-initialize it entirely"""
while chromosome_mutate_num > 0:
chromosome_set[random.randint(0,ga.population_size-1)] = temp_population.get_all_chromosomes()[chromosome_mutate_num]
chromosome_mutate_num -= 1
@ -20,7 +23,8 @@ class Mutation_Methods:
return chromosome_set
def per_gene_mutation(ga, chromosome_set = None, gene_mutate_count = 1):
"""Will iterate through all chromosomes, and if its selected, will randomly replace one of its genes based on initialization values"""
gene_mutate_count_static = int(gene_mutate_count)
if chromosome_set == None:
@ -29,10 +33,12 @@ class Mutation_Methods:
for i in range(len(chromosome_set)):
random_num = random.uniform(0,1)
"""If a chromosome was selected to be mutated"""
if (random_num <= ga.mutation_rate):
while gene_mutate_count > 0:
dummy_population = ga.initialization_impl(ga) #Really inefficient, but works for now
random_index = random.randint(0, ga.chromosome_length-1)
"""Replaces a random gene in the actual chromosome with a gene from a newly initialized chromosome"""
chromosome_set[i].get_genes()[random_index] = dummy_population.get_all_chromosomes()[random.randint(0,ga.population_size-1)].get_genes()[random_index]
gene_mutate_count -= 1
gene_mutate_count = int(gene_mutate_count_static)