CODEWITHSUNDEEP
python-3.xgenetic-algorithmevolutionary-algorithmdeap
usernumber
usernumber

Reputation: 2186

DEAP cooperative coevolution

I don't quite understand the example of cooperative coevolution described in the documentation for DEAP.

What is the target_set, that appears when evaluating individual fitness ? Why is the line for updating fitness

ind.fitness.values = toolbox.evaluate([ind] + r, target_set)

rather than

ind.fitness.values = toolbox.evaluate([ind])

?

Upvotes: 0

Views: 242

Answers (1)

erap129
erap129

Reputation: 960

How I understand it is that the evaluation of an individual from a certain species can only be done in the context of other individuals from all other species.
The individuals that will "help" in the evaluation of other species are the representatives.

In the first generation, no evaluations have been made so the representatives are chosen randomly. After the evaluation of a certain species, its representative is chosen as the fittest one.

To answer your question, I would implement the evaluation function such that it receives a list of individuals, each one from a different species and as they say "possibly some other arguments". Since the individual from the species being currently evaluated will always be in the first index of the list in [ind] + r, I don't see a clear reason to send the target_set variable as well (moreover, they did not set it in their code).

Upvotes: 1

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