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From Al Chou <hotfusion...@yahoo.com>
Subject Re: [Jakarta Commons Wiki] Updated: MathWishList
Date Thu, 02 Sep 2004 17:55:17 GMT
--- Phil Steitz <phil@steitz.com> wrote:
> commons-dev@jakarta.apache.org wrote:
> >    Date: 2004-09-02T06:34:37
> >    Editor: AlChou <achou@apache.org>
> >    Wiki: Jakarta Commons Wiki
> >    Page: MathWishList
> >    URL: http://wiki.apache.org/jakarta-commons/MathWishList
> > 
> >    no comment
> > 
> > Change Log:
> > 
> >
>
------------------------------------------------------------------------------
> > @@ -6,6 +6,7 @@
> >   * Add remedian statistic -
> [http://www.agoras.ua.ac.be/abstract/Remrob90.htm The Remedian: a Robust
> Averaging method for Large Data Sets]
> >   * Add population variance and standard deviation statistic.
> >   * Add 0-1 random number generators. -- Not sure what is being requested
> here. RandomData.nextInt(0, 1) will generate random 0-1 values. Are we
> talking about random binary strings?
> > +   * I assumed this item meant "implement good random number generators,
> e.g., like those described in ''Numerical Recipes'' or Knuth". -- AlChou
>
> Interestingly, as of 1.2 at least, the JDK-supplied PRNG is Knuth's 3.2.1 
> (linear congruential).  I am +1 for adding additional PRNGs, but I would 
> also recommend that if we do that we also include benchmark tests (like 
> the ones here: http://csrc.nist.gov/rng/SP800-22b.pdf), performance 
> metrics and clear documentation indicating what the relative strengths / 
> weaknesses of the additional PRNGs are.

Huh.  So why do I and others think so poorly of the JDK's default PRNG?  Well,
I don't know about others, but I was just ignorant of that fact.

Al

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