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From luc.maison...@free.fr
Subject Re: [math] Sparse Matrix Support
Date Thu, 22 May 2008 07:02:57 GMT
Improving the linear algebra package is a clear need and one of the objectives for version
2.0.

The link to the (short) thread may be this one:
http://markmail.org/message/esfeuzzazz6yeqyk

I have also have another discussion ongoing outside from potential users of [math] who would
like to have fast linear algebra with support for vectors.

I tried to get involved with Mahout developers who where seeking for some math skills at some
point, but the thread ended after my last message without answers (http://markmail.org/message/a743yyz5ycqr2kdv).
The team seems to want to develop its own implementation and not being really interested in
our work. I gave up, but I really think this is a pity, we should be able to work together.

Perhaps is it time to put some ideas on what we need in our linear algebra package to meet
most users needs (SVD, sparse matrices, vectors, efficiency, perhaps complex numbers ...)

Luc

----- Mail Original -----
De: "John Iacona" <plate0salad@gmail.com>
À: "Commons Developers List" <dev@commons.apache.org>
Envoyé: Jeudi 22 Mai 2008 03:56:39 GMT +01:00 Amsterdam / Berlin / Berne / Rome / Stockholm
/ Vienne
Objet: Re: [math] Sparse Matrix Support

This is the book I was referring to
http://www.ec-securehost.com/SIAM/FA02.html

Regards,
John

On Wed, May 21, 2008 at 5:26 PM, Rory Winston <rory.winston@gmail.com>
wrote:

> Hey John
>
> Which book are you referring to?
>
> Also, take a look at the matrix classes in the Apache Mahout project - I
> believe (though dont quote me on it) that they may have some support for
> sparse matrices.
>
> Cheers
> Rory
>
>
> John Iacona wrote:
>
>> I noticed that support for sparse matrix computation was on the commons
>> math
>> wishlist. This is a project I would be interested in taking on.
>>
>> I would like to add a SparseMatrix interface which would support
>> functionality analogous to the RealMatrix interface.
>> I have worked with Tim Davis the author of the CSparse suite and would be
>> using algorithms outlined in his book to base my code on.
>>
>> On the wishlist page there was a reference to a thread using the old
>> archive
>> url format. Does anyone know how to find that thread with the new format?
>> Searches come up empty.
>>
>> Regards,
>>
>> John Iacona
>>
>>
>>
>
>
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