Re: [Cilib-users] mutation for PSO

[Gary P. <gpa...@gm...>]

Sure thing.

I'll post the patch once it's done. Should be a very minor change.

Regards,
Gary

lab...@gm... wrote:
> Hello,
> 
> If the patch for this problem could be posted on the mailing list, I 
> could update my local version before waiting for the new version. TIA.
> 
> 
> On Jan 29, 2009 11:09am, Gary Pampara <gpa...@gm...> wrote:
>  > Hi,
>  >
>  >
>  >
>  > Yes, this is definitely a bug. It should work for Ints as well. I'll 
> post a patch for a correction to this issue in a while.
>  >
>  >
>  >
>  > We are currently refactoring quite a bit in the library to make 
> various operations / usage issues better, as well as a major update to 
> the Javadoc. I'll just need to create a branch to apply the fix.
>  >
>  >
>  >
>  > Would you like the patch posted on the mailing list, or a direct 
> email? This will then also be included in the next release.
>  >
>  >
>  >
>  > Thanks for raising this :)
>  >
>  >
>  >
>  > Regards,
>  >
>  > Gary
>  >
>  >
>  >
>  > myriam abramson wrote:
>  >
>  >
>  > Hello,
>  >
>  > I am trying to evolve integers for an allocation problem, Z(0,20)^10, 
> and I tried to specific MutationPositionUpdateStrategy but unfortunately 
> it does not seem to work for integers. See trace below. Is there a 
> rational for that that I'm missing? I was thinking that instead of 
> evolving a position by incremental velocity changes, mutation would 
> sometimes just produce a new integer. Please let me know if that makes 
> sense. It wouldn't be too hard to implement it on my end.
>  >
>  >
>  >
>  > Exception in thread "main" java.lang.ClassCastException: 
> net.sourceforge.cilib.type.types.Int 
> http://net.sourceforge.cilib.type.types.Int> cannot be cast to 
> net.sourceforge.cilib.type.types.Real
>  >
>  >    at 
> net.sourceforge.cilib.pso.positionupdatestrategies.MutationPositionUpdateStrategy.mutate(MutationPositionUpdateStrategy.java:141)
>  >
>  >    at 
> net.sourceforge.cilib.pso.positionupdatestrategies.MutationPositionUpdateStrategy.updatePosition(MutationPositionUpdateStrategy.java:118)
>  >
>  >    at 
> net.sourceforge.cilib.pso.particle.StandardParticle.updatePosition(StandardParticle.java:156)
>  >
>  >    at 
> net.sourceforge.cilib.pso.iterationstrategies.SynchronousIterationStrategy.performIteration(SynchronousIterationStrategy.java:70)
>  >
>  >    at 
> net.sourceforge.cilib.pso.iterationstrategies.SynchronousIterationStrategy.performIteration(SynchronousIterationStrategy.java:36)
>  >
>  >    at net.sourceforge.cilib.pso.PSO.algorithmIteration(PSO.java:125)
>  >
>  >    at 
> net.sourceforge.cilib.algorithm.Algorithm.performIteration(Algorithm.java:140)
>  >
>  >    at net.sourceforge.cilib.algorithm.Algorithm.run(Algorithm.java:182)
>  >
>  >    at 
> mil.navy.nrl.optimization.route.RoutePlanning.run(RoutePlanning.java:142)
>  >
>  >    at 
> mil.navy.nrl.optimization.route.RoutePlanning.main(RoutePlanning.java:192)
>  >
>  >
>  >
>  >
>  >
>  > ------------------------------------------------------------------------
>  >
>  >
>  >
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