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March 2014

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Subject:
From:
Sean Luke <[log in to unmask]>
Reply To:
ECJ Evolutionary Computation Toolkit <[log in to unmask]>
Date:
Mon, 3 Mar 2014 16:39:59 -0500
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On Mar 3, 2014, at 7:14 AM, Francisco Lopez de la Franca <[log in to unmask]> wrote:

> I've used gp.koza.xover.likelihood to set the probability of performing the crossover operator and I've seen differences in my results, what it sounds good.
> After checking the koza.params file, I see that like for xover, there is a gp.koza.mutate param. I've tried with gp.koza.mutate.likelihood and when printing unaccessed params, the gp.koza.mutate.likelihood appears in that list.

GP has a different traditional pipeline: no mutation is used.  So setting likelihood won't have any effect, since mutation doesn't appear in the pipeline at all.

> Please, how do I set a probability for performing the mutation operator, I mean, with probability 0.x I want the mutation operation to be performed?

You will need to modify the GP pipeline to include mutation as appropriate.

Sean

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