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From "Alex Bertram (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MATH-764) New sample() API should accept RandomGenerator as parameter
Date Wed, 07 Mar 2012 09:08:58 GMT
New sample() API should accept RandomGenerator as parameter
-----------------------------------------------------------

                 Key: MATH-764
                 URL: https://issues.apache.org/jira/browse/MATH-764
             Project: Commons Math
          Issue Type: Improvement
    Affects Versions: 3.0
            Reporter: Alex Bertram


This may come to late as I know the 3.0 release is nearing completion, but I had some concerns
about the new sample() method on the math3 RealDistribution interface. 
Specifically, there doesn't seem to be a way to supply a random generator to the sampler.
Perhaps it would be better to have a factory method on the RealDistribution interface that
accepted a RandomGenerator and returns an instance of some new interface, Sampler, which contains
the sample() methods. 
That is:

interface RealDistribution {
    Sampler createSampler(RandomGenerator generator);
    Sample createSampler(); // uses default RandomGenerator
}

interface Sampler {
    double sample();
    double[] sample(int sampleSize);
}



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