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From Luc Maisonobe <>
Subject Re: JAMA defunct and replaced by Apache Commons-Math?
Date Mon, 19 Oct 2009 18:10:05 GMT
Ted Dunning a écrit :
> But it adds considerable functionality that JAMA did not have and is under
> active development.
> JAMA was a proof of concept for various API structuring ideas.  Commons math
> is about producing production quality software.  JAMA was a one-time project
> and is long since frozen (although it is public domain so you can fork it to
> your heart's content).  Commons math is an ongoing, vital project that you
> can influence and contribute to.
> On Mon, Oct 19, 2009 at 3:24 AM, Phil Steitz <> wrote:
>> Commons-math is not a complete replacement for JAMA.

The one thing commons-math does not provide yet is eigen decomposition
for non symetrical matrices (it provides this decomposition for
symetrical matrices though).

The algorithms that are in both commons-math and JAMA (LU decomposition,
QR decomposition, SVD, matrix operations ...) are often much faster in
commons-math than in JAMA.

Commons-math also provides many features JAMA did not provide.



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