Re: Predation Model

[D. D. Donalson]

Rob,

   I have a lot of experience with predator/prey models, both in discrete
and continuous space.  I haven't a clue what Star Logo is.  I see you at
Calgary?  Do you know Ed McCauley(sp?)?  He has worked extensively with
several of my graduate committee members, including my advisor, Roger
Nisbet. Ed is also quite familiar with individual based predator/prey
models.   Anyway, I would be glad to help you.  Is the problem you are
describing that space fills up around an agent?  Why does the agent get
"trapped"?

Cheers,

   D4

----- Original Message -----
From: " Rob Leclerc" <address@hidden>
To: <address@hidden>
Sent: Friday, March 30, 2001 3:50 PM
Subject: Predation Model


>     I am wondering if anyone has any experience with predation model.
Given
> that Swarm only has a discrete 2D gird by default, now allowing for
multiple
> objects at the same X,Y coordinate, I originally coded my model for this.
> After looking over some of the data I am begining to wonder if the
behaviour
> would change if I went to some sort of vector space implementations at
each
> grid space.  This is how the implementaiton works in StarLogoT.   The
> problem is, is that on a regular 2D grid space, objects created will often
> become "trapped" and unable to move.  If anyone has any thoughts on this
it
> would be great.
>
> Thanks
> Rob Leclerc
>
> ----- Original Message -----
> From: "Marcus G. Daniels" <address@hidden>
> To: <address@hidden>
> Sent: Friday, March 30, 2001 3:49 PM
> Subject: Re: A probe question
>
>
> > >>>>> "D4" == D D Donalson <address@hidden> writes:
> >
> > D4> What I meant was in the following code, there is a solitary ":" that
> > D4> looks like a separate method between randomMoveProb and
toggleRandom.
> >
> > D4> "maxOutputHeat", "evaporationRate", "randomMoveProbability", ":",
> > D4> "toggleRandomizedOrder", "addHeatbug:", NULL];
> >
> > Oh, that separates the VarProbes from the MessageProbes; the first set
> > are all variable names and the second set are message names.  It's
> > supposed to be a terse way to set up a ProbeMap, but to me it just
> > seems kind of creepy.  Otherwise, you have to explicitly instantiate
> > the kind of probe you want and pass it to addProbe for each variable
> > or message...
> >
> >
> >                   ==================================
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>
>                   ==================================
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                  ==================================
   Swarm-Support is for discussion of the technical details of the day
   to day usage of Swarm.  For list administration needs (esp.
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   with "help" in the body of the message.