Re: guassian distribution generator

[Rick Riolo]

Manor,
thanks for pointing that out.  (I guess I did miss that
in your previous message...)

I would suggest/request that you add an additional method:

-(float) getGuassianWithMean: (float) mean andSD: (float) sd;

(or something like that syntax)
so that one can easily/cleanly make many requests with
different means/stddevs  (eg when each agent has its own
distribution).

thanks!
- r

Rick Riolo                       address@hidden
Program for Study of Complex Systems (PSCS)
1061 Randall Lab     University of Michigan
Ann Arbor MI 48109-1120
http://pscs.physics.lsa.umich.edu/rlr-home.html

On Fri, 23 Aug 1996, Manor Askenazi wrote:

> Date: Fri, 23 Aug 96 12:26:22 MDT
> From: Manor Askenazi <address@hidden>
> To: address@hidden
> Cc: address@hidden
> Subject: Re: guassian distribution generator
> 
> > Has anyone ported a guassian distribution generator (given some mean and 
> > sd) to Swarm,
> 
> Hi Rick!
> 
> Did you miss this (from a previous message I sent)?
> 
> ------------------------------------------------------------------------
> 
> Also with respect to 'serious' scientific simulation (especially in the
> humanities :-) we have the Gaussian object:
> 
> /************************** Gaussian *****************************/
> 
>   @interface Gaussian: SwarmObject {
>     id uniform ;
>     float mean, std ;
>     int stored ;
>     float stored_result ;
>   }
> 
>   +create: aZone withMean: (float) aMean 
>                       Std: (float) aStd 
>                   andSeed: (unsigned) aSeed ;
> 
>   +create: aZone withSeed: (unsigned) aSeed ;
> 
>   -initSeed: (unsigned) aSeed ;
> 
>   -setMean: (float) theMean ;
>   -setStd: (float) theStd ;
> 
>   -setUniform: aUniform ;
>   -getUniform ;
> 
>   -(float) rFloat ;
> 
>   @end
> 
> /****************************************************************/
> 
> 
> Note that unlike the other RNGs, Guassian is a Swarmobject and also has
> a very visible and straightforward way to change the seed (Nelson's original
> RNG's were meant to be distributable separately from Swarm so they are not
> created in the usual way, also, the way in which users change the seed is 
> not intuitive enough - this may be 'corrected' by the next release).
> 
> ------------------------------------------------------------------------
> 
> I was expecting to release this along (with the other new stuff which I 
> have reported on in that email).... Also, Sven Thommesen is working on a 
> few additional Distributions as we speak!
> 
> Regards,
> 
> Manor.
>