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June 2015

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ECJ Evolutionary Computation Toolkit <[log in to unmask]>
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Wed, 3 Jun 2015 08:16:25 -0400
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ECJ Evolutionary Computation Toolkit <[log in to unmask]>
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Sean Luke <[log in to unmask]>
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Then that must be a bug.  I can look into it, but if you want to beat me to it, you might check out FloatVectorSpecies.

Sean

On Jun 3, 2015, at 4:20 AM, Eric Scott <[log in to unmask]> wrote:

> Dear Wizards,
> 
> The JavaDoc for FloatVectorSpecies claims that when using Guassian mutation, "if the gene-by-gene range is used, than the standard deviation is scaled to reflect each gene's range."
> 
> As far as I can tell, however, this doesn't actually happen.  Stepping through the debugger with the following mutation parameters, I can watch DoubleVectorIndividual.gaussianMutation() as it samples from a std of 0.1 when mutation gene 0.  I would have expected it to scale the std to be 0.0001 or such.
> 
> pop.subpop.0.species.min-gene =         -1.0
> pop.subpop.0.species.max-gene =         1.0
> pop.subpop.0.species.min-gene.0 =         -.001
> pop.subpop.0.species.max-gene.0 =         .001
> pop.subpop.0.species.mutation-type =    gauss
> pop.subpop.0.species.mutation-stdev =   0.1
> pop.subpop.0.species.mutation-bounded = true
> pop.subpop.0.species.mutation-prob =    0.03
> 
> Is this an error in the documentation? Or am I missing something?
> 
> Thanks,
> Siggy
> 
> -- 
> 
> Ph.D student in Computer Science
> George Mason University
> http://mason.gmu.edu/~escott8/

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