----- Original Message -----
From: "Ted Dunning" <ted.dunn...@gmail.com>
To: "Commons Developers List" <dev@commons.apache.org>
Sent: Saturday, December 12, 2009 11:17 AM
Subject: Re: [math] getting changes included into commons-math (was Re:
Homefor the colt fork)
MATH-312, 314, 316 and 317 were the first round.
Some of the necessary changes included:
- sparse iterators for sparse vectors
- view semantics for sub-matrix and sub-vectors
- additional sparse vector types for specialized applications
- introduction of an unbounded sparse matrix/vector that simply remembers
the highest bound set
- introduction of abstract classes to allow off the cuff inner
implementations of virtual vectors
- introduction of additional decomposition classes
- introduction of row and column label abstraction for matrices and
vectors
- higher performance implementations
The 5 issues that Jake filed were mostly address the first point. That
stalled out when he hit resistance to change.
Since then we have adopted Colt as our matrix/linear algebra/collections
implementation and we don't really need any changes to MATH.
Except for MATH-314 (which doesn't have a patch), these JIRA issues are
largely implemented in [math] now. It will probably have to be improved
before a 2.1 release, but works well enough for now.
I'm sorry that you feel that [math] doesn't meet your needs. However, I'm
grateful to Jake for his contributions that have made [math] a better
project.
On Sat, Dec 12, 2009 at 8:35 AM, J.Pietschmann <j3322...@yahoo.de> wrote:
On 09.12.2009 20:58, Jake Mannix wrote:
The commons-math linear APIs have been described as effectively locked
until 3.0, due to back-compat requirements.
Can you give a short summary of the API changes which are necessary
to incorporate and use the functionality you need? Some functionality
I've seen mentioned here could probably be pressed in the existing
API, but I may have missed some details.
J.Pietschmann
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Ted Dunning, CTO
DeepDyve
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