Re: [jgap-users] Promoting Genotype Diversity

[Klaus M. <jg...@kl...>]

Simon,
 
thanx for your interest in JGAP.
Regarding the fitness function you are free to define your own (to be
honest: You have to define your owu fitness function for your own problems
to solve).
Regarding promoting diversity, it would be a good idea to implement specific
genetic operators, such as crossover and mutation operator in order to
generate diverse chromosomes.
Please see the JGAP source code. There you find a lot of examples with
different fitness functions. In package org.jgap.impl., you find several
crossover and mutation operators that may guide you in implementing your
own.
 
Best

Klaus
www.klaus-meffert.com <http://www.klaus-meffert.com/> 

 


  _____  

From: Simon Greaves [mailto:si...@ya...] 
Sent: Wednesday, February 06, 2013 7:21 PM
To: jga...@li...
Subject: [jgap-users] Promoting Genotype Diversity


Hello
My name is Simon and I'm trying to implement JGAP to solve a problem that
has potentially multiple acceptable solutions, so I want to promote
diversity during evolution, so that I won't in the end have the top n
chromosomes simply be almost identical to the optimal chromosome. In the
theory one of the ways to do this is by using the Hamming Distance to
devalue the Fitness Function of the chromosomes.
Is there a way to do this in JGAP? Or some other way to promote population
diversity?
Otherwise I would need to change the current Fitness  Function in order to
compare one chromosome with the others in the Genotype, which I'm not sure I
can do...

Thanks in advance for any help you can give me!

Simon