Re: Anybody has experience with Normal distriubution of javaswarm?

[Paul Johnson]

Please consult the recently enhanced guidelines on how to ask for help:

http://lark.cc.ukans.edu/~pauljohn/Swarm/SwarmFaq/SwarmOnlineFaq.html#5.1

I don't understand why this one crashes and i wonder if it is caused by 
something in your computer's operating system or the particular edition 
of Swarm you are using.  One can only speculate. It appears to me the 
setting phase usage should be sufficient.  Are you sure 
meanGAParameterMutation and stdGAPParameterMutation are doubles?

In the manual  I see;
DistImpl(Zone aZone, Object generator, double mean, double sdev)

and I think that means you could try to get all this done in the 
constructor:

NormalDistImpl normDist = new 
NormalDistImpl(getZone(),Globals.env.randomGenerator, 
meanGAParameterMutation,stdGAParameterMutation);

This takes care of it all in one shot. I don't do a lot of Java, so my 
syntax here for your Zone may not be exactly right.


I do know the Normal does work because I have a project that uses it and 
my usage is this style:
  NormalDist1 = new NormalDistImpl (getZone(), newRandomGenForNormal1) ;

  holderfloat = NormalDist1.getSampleWithMean$withVariance (70, 100);

and it does work.

pj




Hu, Jianjun wrote:
> I am using the swarm-2.1.1 java version.  but now I met the following
> problem.
> The normal distribution of the swarm doesn't work!.
>
> Here is my simple code:
>
>          NormalDistImpl normDist = new NormalDistImpl();
>          normDist.setMean$setStdDev(meanGAParameterMutation,
> stdGAParameterMutation);
>
>          if ((Globals.env.uniformDblRand.getDoubleWithMin$withMax (0.0, 1.0))
>                  < pGAParameterMutation){
>                  double offset = normDist.getDoubleSample();    //Gaussian 
> mutations
>                  pGASitDefault+= offset;
>                  if(pGASitDefault<0) pGASitDefault = 0.0;
>                  else if(pGASitDefault>1) pGASitDefault = 1.0;
>          }
>
> compilation is ok. but
> The runtime error is:
> unable to find Java selector `setMean:setStdDev:' in objc:`JavaProxy'
> 0xa6ae0d8 java: 0xa17cf90 hash: 18063
>
> It seems that I can't call the setMean$setStdDev function.
>
> What's wrong?
>
>
> Your help is greatly appreciated.
>
>
> Jianjun  Hu


--
Paul E. Johnson                       email: address@hidden
Dept. of Political Science            http://lark.cc.ku.edu/~pauljohn
University of Kansas                  Office: (785) 864-9086
Lawrence, Kansas 66045                FAX: (785) 864-5700


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