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July 2005

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Subject:
Re: GP regression, tutorial4 and Koza
From:
Sean Luke <[log in to unmask]>
Reply To:
ECJ Evolutionary Computation Toolkit <[log in to unmask]>
Date:
Mon, 25 Jul 2005 14:57:24 -0400
Content-Type:
text/plain
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text/plain (23 lines) 
I mean that if an individual returns NaN, then set it to a very poor
fitness.  Try printing out a note whenever this happens, and you'll see
that very quickly NaN-generating individuals disappear from the
population.

Sean

On Jul 25, 2005, at 2:40 PM, Steve Butcher (Steve-O) wrote:

> Sean,
>
> Thanks for the reply...I got the gist of most of it. However, your
> parting comment was a bit cryptic to me. Could you elaborate?
>
> Thanks,
> Steve
>
> On Jul 25, 2005, at 12:32 PM, Sean Luke wrote:
>
>> The simpler solution is to set NaN and infinity to very bad function
>> sets.  They tend to get weeded out rapidly.
>>

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