Re: Sub-swarms

[Paul Johnson]

Dear Ken:
  Do you remember this?  I wonder if you think your advice works.

   Now I'm grepping through the swarm list trying to fill out answers to a
list of programming FAQs that Rick Riollo and a few others have helped me
formulate.  One question I certainly want to answer is "How can I make my
simulation run over and over again," and your comments here are, as usual,
excellent and understandable. I just wondered if they are "up to date"


On 05-Aug-97 Ken Cline wrote:
> 
> Vinicius,
> 
> I gather you are trying to run several simulations
> sequentially inside one.  I haven't tried this, but that
> doesn't stop me from responding [grin] ...
> 
> Some thoughts:
> 
>    - ObserverSwarm's are (usually) a subclass of GUISwarm
>         and, as such, have a control panel.  You may or
>         may not want more than one control panel.
> 
>    - If you do want a control panel for each "run" inside
>         the simulation then you may have to create a new
>         type of control panel.  For example, if you click
>         `quit' on any control panel I *think* this will
>         end the whole simulation.
> 
>    - You might consider having only one ObserverSwarm and
>         just creating a new ModelSwarm for each "run".
> 
> 
> This is the way I am thinking you could do it:
> 
>    In main.m:  No Changes
> 
>    In ObserverSwarm:  
>       Move all the code in buildObjects, buildActions, and
>       activateIn that builds the ModelSwarm and related 
>       analysis objects.  Put all this stuff in a new method 
>       called `buildModelSwarm'.
> 
>       Now, on the displaySchedule, create an action that
>       calls `buildModelSwarm'.
> 
>       Use `setStateStopped' to pause between each run.
> 
>    In ModelSwarm:
>       Put in a method that accepts a list of agents and
>       uses those agents to populate the model.
> 
>       Also, add a method that does a "checkToStop" and
>       schedule this method on the model's repeating
>       schedule.
> 
>       Finally, add a `stop' method that, when the model
>       decides to stop, it evaluates the current population,
>       passes the "most fit" agent's back to the Observer and
>       drops the rest.
> 
>       Finally, the ModelSwarm  notifies the ObserverSwarm
>       that it has completed so that the ObserverSwarm can
>       drop the unnecessary objects and then create a new
>       model using `buildModelSwarm' and the "most fit" from
>       the last run.
> 
> 
> Again, I've never tried any of this and I have no idea if
> it would even work.  If you've already started on another
> way then I would probably stick with that, if I were you.
> 
> (I thought someone had already built something like what
> you're trying to do, but I could be mistaken.)
> 
> Does anyone else have another way?
> 
> 
> Ken.
> 
> 
> 
> On Mon, 4 Aug 1997, Marcus Vinicius Pereira Pessoa wrote:
> 
>> Hi all,
>> 
>> I’m trying to call swarms within a swarm. I’m making an application in
>> which I will evolve a group strategy. In a model similar to hello-world,
>> I will use a variation from Merelo’s GA lib. So I have some questions:
>> 
>> 1) How can I call a whole application via the main-ModelSwarm?
>> 
>> 2) From which sub-ObserverSwarm method can I receive a parameter back?
>> 
>> 3) Will the matter previously discussed, about problems with the
>> schedule, have any influence in the model?
>> 
>> I think that the evaluation function will be something like:
>> 
>> float evalFunc( id<Chromosome> a ) {
>> 
>>   int argc;
>>   char ** argv;
>>   PplObserverSwarm * observerSwarm;
>> 
>>   initSwarm(argc, argv);
>> 
>>   observerSwarm = [PplObserverSwarm create: globalZone];
>>   [observerSwarm buildObjects: a];           //here I’m passing the group of
>> agents
>>   [observerSwarm buildActions];
>>   [observerSwarm activateIn: nil];
>>   [observerSwarm go];
>> 
>> 
>>   return "evaluated value";                  //a value must return
>> }
>> 
>> Thanks in advance,
>> 
>> Vinicius.
>> 
> 
> _________________________________________________________
> Ken Cline                             address@hidden
> SAIC                                 VOICE (410) 571-0413
> Annapolis, MD                          FAX (301) 261-8427
> 
> 
> 
> 
> 
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E-Mail: Paul Johnson <address@hidden>
Date: 24-Feb-98
Time: 23:53:23

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