Re: [Cilib-users] matrix representation

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

Yes, thanks. I think I can modify the velocityupdatestrategy program to  
handle a matrix representation. It's a tradeoff between doing it like that  
or translating back and forth in other places.

On Jan 6, 2009 12:13am, Gary Pampara <gpa...@gm...> wrote:
> Hi,
>
>
>
> There is absolutely nothing wrong with the XML specification. The
>
> problem is in fact with the representation and the current standard
>
> classes in CIlib.
>
>
>
> By default, the larger majority of Swarm Intelligence problems have
>
> candidate solutions that are represented by a single vector. In your
>
> XML, you have defined that the domain in which the you want the
>
> algorithm to operate in, is a space that can effectively be represented
>
> as a matrix (or multi-dimensional array).
>
>
>
> During the algorithm setup and construction, the particles that are
>
> generated do in fact have matrices as their internal representations.
>
> The problem comes in that the default Velocity and Position update
>
> equations expect Vectors and not a Vector of Vectors (which is the
>
> current manner a Matrix is built using the domain strings - this may
>
> change in the near future).
>
>
>
> There should be 3 things that need to change.
>
> - The particles need to be told that their velocity and position update
>
> equations need to be altered so that they can handle Matrix instances.
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> - The problem needs to be aware that the candidate solution that it
>
> needs to evaluate is in fact a matrix and not a simple Vector class.
>
>
>
> Does this all make sense?
>
>
>
> Regards,
>
> Gary
>
>
>
> lab...@gm... wrote:
>
> > Sorry, I was on vacation. Happy New Year to all, BTW :-)
>
> >
>
> > Here's an xml file. Maybe I'm doing something wrong? TIA.
>
> >
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> >
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> >
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> >
> >
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> >
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> >
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> > ]>
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> >
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> >
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> >
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> >
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> >
> > maximumIterations="1000" />
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> >
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> >
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> >
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> >
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> >
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> >
> > domain="[R(-5.0,5.0)^5]^5"/>
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> >
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> >
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> >
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> >
> > resolution="10" samples="1">
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> >
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> >
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> >
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> >
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> >
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> >
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> >
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> >
> > file="data/spherical3.gbest.p20w1.0c1_2c2_2NoVmax.txt"/>
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> >
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> >
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> >
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> >
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> >
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> > On Dec 23, 2008 6:54am, Gary Pampara gpa...@gm...> wrote:
>
> >> Continuing this discussion on the developer list.
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> >>
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> >>
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> >>
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> >> Gary Pampara wrote:
>
> >>
>
> >> > Hi,
>
> >>
>
> >> >
>
> >>
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> >> > I'll have a look at this.
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> >>
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> >> >
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> >>
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> >> > Regards,
>
> >>
>
> >> > Gary
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> >>
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> >> >
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> >>
>
> >> > lab...@gm... wrote:
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> >>
>
> >> >> registry.setDomainString("[R(-5.0, 5.0)^10]^10");
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> >>
>
> >> >> yeah, that does not work too well. I get the following error:
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> >>
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> >> >>
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> >>
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> >> >> Exception in thread "main" java.lang.UnsupportedOperationException:
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> >>
>
> >> >> Attempted to perform a numeric operation on non-numeric type
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> >>
>
> >> >> at
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> >>
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> >> >>
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> >  
net.sourceforge.cilib.type.types.container.Vector.getNumeric(Vector.java:414)
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> >>
>
> >> >> at
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> >>
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> >> >>
>
> >  
net.sourceforge.cilib.type.types.container.Vector.getReal(Vector.java:466)
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> >>
>
> >> >> at
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> >>
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> >> >>
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> >  
net.sourceforge.cilib.pso.velocityupdatestrategies.StandardVelocityUpdate.updateVelocity(StandardVelocityUpdate.java:89)
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> >>
>
> >> >> at
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> >>
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> >> >>
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> >  
net.sourceforge.cilib.pso.particle.StandardParticle.updateVelocity(StandardParticle.java:186)
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> >>
>
> >> >> at
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> >>
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> >> >>
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> >  
net.sourceforge.cilib.pso.iterationstrategies.SynchronousIterationStrategy.performIteration(SynchronousIterationStrategy.java:69)
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> >>
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> >> >> at
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> >>
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> >> >>
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> >  
net.sourceforge.cilib.pso.iterationstrategies.SynchronousIterationStrategy.performIteration(SynchronousIterationStrategy.java:36)
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> >>
>
> >> >> at net.sourceforge.cilib.pso.PSO.algorithmIteration(PSO.java:125)
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> >>
>
> >> >> at
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> >>
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> >> >>
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> >  
net.sourceforge.cilib.algorithm.Algorithm.performIteration(Algorithm.java:140)
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> >>
>
> >> >> at net.sourceforge.cilib.algorithm.Algorithm.run(Algorithm.java:182)
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> >>
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> >> >>
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> >>
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> >> >>
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> >>
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> >> >>
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> > ------------------------------------------------------------------------
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> >>
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> >> >>
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> >>
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> >> >>
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> >  
------------------------------------------------------------------------------
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> >>
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> >> >>
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> >>
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> >> >>
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> >>
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> >> >>
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> > ------------------------------------------------------------------------
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> >>
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> >> >>
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> >>
>
> >> >> _______________________________________________
>
> >>
>
> >> >> Cilib-users mailing list
>
> >>
>
> >> >> Cil...@li...
>
> >>
>
> >> >> https://lists.sourceforge.net/lists/listinfo/cilib-users
>
> >>
>
> >> >
>
> >>
>
> >> >
>
> >  
------------------------------------------------------------------------------
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> >>
>
> >> > _______________________________________________
>
> >>
>
> >> > Cilib-users mailing list
>
> >>
>
> >> > Cil...@li...
>
> >>
>
> >> > https://lists.sourceforge.net/lists/listinfo/cilib-users
>
> >>
>