Re: [Cilib-users] mutation for PSO

[<lab...@gm...>]

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)
>
>
>
>
>
> ------------------------------------------------------------------------
>
>
>
>  
------------------------------------------------------------------------------
>
> This SF.net email is sponsored by:
>
> SourcForge Community
>
> SourceForge wants to tell your story.
>
> http://p.sf.net/sfu/sf-spreadtheword
>
>
>
>
>
> ------------------------------------------------------------------------
>
>
>
> _______________________________________________
>
> Cilib-users mailing list
>
> Cil...@li...
>
> https://lists.sourceforge.net/lists/listinfo/cilib-users
>
>