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From Phil Steitz <p...@steitz.com>
Subject Re: [Jakarta Commons Wiki] Updated: MathWishList
Date Thu, 02 Sep 2004 12:28:23 GMT
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.
>   * Add sparse matrix implementation.
>   * Add a fraction type - Can start with implementation contributed to [lang] here [http://issues.apache.org/bugzilla/show_bug.cgi?id=29294]
>   * Add submatrix accessors - [http://issues.apache.org/bugzilla/show_bug.cgi?id=30896]
> 
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