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RE: Genetic Programming or breeding Perls

by Crayman (Acolyte)
on Oct 16, 2000 at 07:01 UTC ( #36864=note: print w/ replies, xml ) Need Help??


in reply to Genetic Programming or breeding Perls

cool concept and the implementation looks well done. i need to study it more in order to make any detailed or deep comments. extremely minor nitpiks and some questions. 1) someone already covered the map in void context. 2) my $min = ${$fitnesses}[0]; for ($i = 0; $i < $size; ++$i) { # set $i = 1 since you used 0th index to load $min. # same thing for the $max value in a diff routine later. $min = ${$fitnesses}[$i] if (${$fitnesses}[$i] < $min); } 3) sub random_gene { my $self = shift; return ${$self->{GENES}}[rand(@{$self->{GENES}})]; why do you allow perl to truncate the above, which provides a fair distribution for the 0th index, but you handle explicitly below, which never includes the 0th index? there may be a good reason, but i couldn't figure out what it was. if (rand(1.0) < 0.005) { my $mutate = 1 + int(rand(@{$self->{NEW_GENES}} - 1)); 4) if (rand(1.0) > 0.5) { my $cut = 1 + int(rand(@genes1 - 1)); # i understand it here - since replacing the entire gene from beginning might not make sense 5) i factored out the following from the code so I could stick everything on the top and play: my $Genes = ['$x+=1 ;', '$x=$y ;', '$y=$x ;', '$x|=$y ;', '$x+=$y ;', + ' ;']; my $IndivGeneLen = 32; my $PopSize = 1999; my $Target = 10512; my $NumGenerations = 100; next thought - this can be generalized into a module. very cool, thanks!
___cliff_AT_rayman.com___


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RE: RE: Genetic Programming or breeding Perls
by Crayman (Acolyte) on Oct 16, 2000 at 10:12 UTC
    i figured out the answer to #3. the declaration of the lexical variables occur in index 0, that makes them position dependent. therefore index 0 has to be skipped during mutations and splicing. something like this might be worthy of a comment in the code. ___cliff rayman___cliff_AT_rayman.com___
RE: RE: Genetic Programming or breeding Perls
by Crayman (Acolyte) on Oct 16, 2000 at 10:13 UTC
    i figured out the answer to #3.  the declaration of the lexical
    variables occur in index 0, that makes them position dependent.
    therefore index 0 has to be skipped during mutations and splicing.
    something like this might be worthy of a comment in the
    code.
    ___cliff rayman___cliff_AT_rayman.com___
    

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