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July 2014

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ECJ Evolutionary Computation Toolkit <[log in to unmask]>
Date:
Tue, 29 Jul 2014 14:29:38 -0300
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ECJ Evolutionary Computation Toolkit <[log in to unmask]>
Subject:
Re: where ECJ calls Evaluate() method
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From:
Márcio Basgalupp <[log in to unmask]>
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Thanks, but there is no loop in the method evolve() of my EvolutionState.java.

public int evolve()

        throws InternalError, FileNotFoundException, IOException,
Exception { return R_NOTDONE; }


The same for SimpleEvolutionState.java


This loop (varying the children/individuals) is exactly what I'm looking for.

Best,
Márcio



--------
Prof. Dr. Márcio Porto Basgalupp
Instituto de Ciência e Tecnologia (ICT)
Universidade Federal de São Paulo (UNIFESP)
Tel: +55 12 3309-9582


On Tue, Jul 29, 2014 at 12:23 PM, Eric 'Siggy' Scott <[log in to unmask]> wrote:
> The post-evaluation stage is only for running statistics.
>
> Look in the evolve() method of your EvolutionState -- that has the
> high-level loop.  You'll probably want to customize your Evaluator to add a
> post-processing step, leaving the EvolutionState as is.
>
> Siggy
>
>
> On Tue, Jul 29, 2014 at 11:02 AM, Márcio Basgalupp <[log in to unmask]>
> wrote:
>>
>> Thank you Ye.
>>
>> That's true.
>>
>> But my question is: where (in the code) is this post-evaluation stage?
>>
>> Best,
>> Márcio
>> --------
>> Prof. Dr. Márcio Porto Basgalupp
>> Instituto de Ciência e Tecnologia (ICT)
>> Universidade Federal de São Paulo (UNIFESP)
>> Tel: +55 12 3309-9582
>>
>>
>> On Tue, Jul 29, 2014 at 11:40 AM, Xiaomeng Ye <[log in to unmask]>
>> wrote:
>> > It has been a while since I last used ECJ. I could be totally wrong.
>> >
>> > I remember there is a post-evaluation stage for each generation in the
>> > evolution. If I am going to divide all fitness values by the biggest
>> > one. I
>> > will do it in this post-evaluation stage.
>> >
>> > This post-evaluation stage is probably between the evaluation stage
>> > (where
>> > the fitness are calculated) and the breeding stage (where
>> > crossover/mutation
>> > happens).
>> >
>> >
>> > On Tue, Jul 29, 2014 at 10:18 AM, Márcio Basgalupp <[log in to unmask]>
>> > wrote:
>> >>
>> >> Dear all,
>> >>
>> >> I'm using ECJ for implementing a GP based-program. After evaluating
>> >> (compute fitness) all individuals, I would like to "update" these
>> >> fitness values (for example, divide all fitness values by the biggest
>> >> one). However, I couldn't find where (which class) I have to do that.
>> >> It should be where ECJ calls the method evaluate() for each
>> >> individual, then I could update before proceeding to the next steps
>> >> (select, genetic operators, ...).
>> >>
>> >> I would appreciate if someone help me.
>> >>
>> >> Best,
>> >> Márcio
>> >>
>> >> --------
>> >> Prof. Dr. Márcio Porto Basgalupp
>> >> Instituto de Ciência e Tecnologia (ICT)
>> >> Universidade Federal de São Paulo (UNIFESP)
>> >> Tel: +55 12 3309-9582
>> >
>> >
>
>
>
>
> --
>
> Ph.D student in Computer Science
> George Mason University
> http://mason.gmu.edu/~escott8/

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