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Nope, they are running fine. However, I managed to solve this issue by
modifying the tournament size and adding elitism.

On Tue, 22 May 2012 11:29:52 -0400, doranchak <[log in to unmask]> wrote:

>Do the fitness scores also "jump around" when you run the first float-based
regression problem that comes with the cgp package?
>
>On May 21, 2012, at 10:31 AM, Andreas Meier wrote:
>
>> Hello,
>>
>> With the help of the CGP framework, I implemented a small problem which is
>> roughly the same as the first float-based regression problem that is part of
>> the cgp-package. Maybe I'm doing something wrong but I'm wondering that the
>> achieved fitness scores are "jumping around". Whereas in my classic ECJ/GP
>> implementation the scores are monotonically decreasing with every generation
>> in ECJ/CGP they often alternate and do not show such a trend. Do you have an
>> idea what the reason for this behaviour could be?
>>
>> Thanks in advance!
>>
>> Andreas