Ublas :

david.bellot_at_[hidden]

-- 
David Bellot, PhD
david.bellot_at_[hidden]
http://david.bellot.free.fr
On Mon, Mar 15, 2010 at 15:59, <rrossi_at_[hidden]> wrote:
> Hi David,
>
>           i just wanted to say that if you find it useful we have a
> sparse_matrix * sparse_matrix version that should be quite efficient.
>
>
>
> unfortunately it is not really in ublas format, as the ublas does not allow
> constructing a CSR matrix using the vectors of indices and the vector of
> data. Let me know if you need it.
>
>
>
> We also have some CUDA solver, which may be of interest. Once again it uses
> directly the three vectors of CSR, even if in our code we internally use
> ublas ...
>
>
>
> let me know if some of this could be of help
>
> greetings
>
> Riccardo
>
>
>
>
> On Sun 14/03/10 9:44 PM , David Bellot <david.bellot_at_[hidden]> wrote:
>
> Dear uBLAS users,
>
> recently Gunter Winkler asked for someone to take over the maintenance of
> the uBLAS library. As a fervent user of uBLAS and a strong believer in Open
> Source and Free Software, I decided to propose myself as the new duty man. I
> will therefore have the honor to be in charge of uBLAS and will do my best
> to make uBLAS reach its goals of versatility, performance and ease of use.
>
> Let me quickly introduce myself: my name is David Bellot, I hold a PhD in
> Computer Science and do research (currently in the finance world) on Machine
> Learning and probabilistic artificial intelligence, hence my strong interest
> in uBLAS.
>
> First of all, I want to say a big Thank You to Gunter for all the great
> work he did on uBLAS and a personal Thank You to help me getting on-board
> and starting my new duty as uBLAS maintainer.
>
> I would also like to talk about potential projects for the next versions of
> uBLAS. For that purpose, I hope everybody will be interested in bringing new
> ideas, wishes and even new pieces of code:
>
> (1) as you can imagine, in machine learning, one often needs to "randomly"
> access to sub-matrices. A good framework is already in place for
> matrix_view, I would like to extend it so that to make it as versatile as it
> is in other libraries or even Matlab.
>
> (2) after reading last week emails, I think we could provide basic
> implementations of a few standard algorithms like inversion, solvers, etc...
>
> (3) bindings are a hot topic. Let's be pragmatic: it's not supposed to be
> part of uBLAS but having a standard interface would add a strong value to
> uBLAS. And, I am like others, I want to play with my brand new nVidia card.
>
> (4) another hot topic which is a recurrent complain about uBLAS: the
> product of 2 matrices. Do we want prod(A,B) or A*B. Let's think about it
> because other libraries implemented A*B in a very efficient manner too.
>
> (5) Bindings for big libraries are also important and subject to
> discussion. I think we have to work more on the interface between all
> standard libraries when it is needed because, at the end of the day, people
> also want to use uBLAS to make computations with existing standard and not
> just write brand new algorithms.
>
> (6) I will join Gunter in his effort to provide new documentation, covering
> more topics, with tutorial and advanced topics. uBLAS is a great library and
> a good documentation is of primary interest. That is one of the most
> important topic for me (yes, way more than prod(A,B) versus A*B)
>
> Please everybody contribute with your own ideas and desiderata.
> Let's work and make uBLAS simply the best.
>
> With my Best Regards,
> David Bellot
>
> --
> David Bellot, PhD
> david.bellot_at_[hidden]
> http://david.bellot.free.fr
>
>
>
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