May 23, 2012
Hi All.

OK. I'm sold on using D to develop an experimental hydrologic modeling code, but I need a sparse linear algebra package. Has anyone either developed such a package in D or linked to an existing C or C++ library? There are a number of existing free libraries out there, and I hate to reinvent the wheel. If no such D library interface exists, I'm happy to work on one as a community project, but I suspect I'll need quite a bit of help. Is anybody game for such a project?

THANKS!
--vic
May 23, 2012
You might want to check out https://github.com/cristicbz/scid
May 23, 2012
On Wed, 23 May 2012 16:16:19 +0200, Vic Kelson wrote:

> Hi All.
> 
> OK. I'm sold on using D to develop an experimental hydrologic modeling code, but I need a sparse linear algebra package. Has anyone either developed such a package in D or linked to an existing C or C++ library? There are a number of existing free libraries out there, and I hate to reinvent the wheel. If no such D library interface exists, I'm happy to work on one as a community project, but I suspect I'll need quite a bit of help. Is anybody game for such a project?
> 
> THANKS!
> --vic

I work for an economic modeling firm and we use a lot of D. We generally just link against BLASPack or Intel MKL for our linear algebra needs (linking C libs in D is really easy).

D's compile-time code generation abilities make the thought of a native D solution rather interesting, but it would probably take years for such a project to reach the maturity level of existing libraries.

Justin
May 23, 2012
On Wednesday, 23 May 2012 at 15:27:54 UTC, Trass3r wrote:
> You might want to check out https://github.com/cristicbz/scid

I had found scid. For some of my work, BLAS and LAPACK are fine (full matrices), and I can use it for small problems on this project. But for large problems, I need a sparse solver, like PetSC or other solvers.

THANKS!
May 23, 2012
On Wednesday, 23 May 2012 at 16:12:40 UTC, Justin Whear wrote:
> On Wed, 23 May 2012 16:16:19 +0200, Vic Kelson wrote:
>
>> Hi All.
>> 
>> OK. I'm sold on using D to develop an experimental hydrologic modeling
>> code, but I need a sparse linear algebra package. Has anyone either
>> developed such a package in D or linked to an existing C or C++ library?
>> There are a number of existing free libraries out there, and I hate to
>> reinvent the wheel. If no such D library interface exists, I'm happy to
>> work on one as a community project, but I suspect I'll need quite a bit
>> of help. Is anybody game for such a project?
>> 
>> THANKS!
>> --vic
>
> I work for an economic modeling firm and we use a lot of D. We generally
> just link against BLASPack or Intel MKL for our linear algebra needs
> (linking C libs in D is really easy).
>
> D's compile-time code generation abilities make the thought of a native D
> solution rather interesting, but it would probably take years for such a
> project to reach the maturity level of existing libraries.
>
> Justin

Alas, I'm working on an experimental code, and if it's a success, I'll give it away. I can't afford Intel MKL for a free project.

I agree that a D implementation would be cool, but perhaps I'll just bite the bullet and try to convert headers for an existing library. Never done that before...

Thanks!

May 23, 2012
> I agree that a D implementation would be cool, but perhaps I'll just bite the bullet and try to convert headers for an existing library. Never done that before...

It's not that hard to convert C headers.
Just put an extern(C): at the top of the module, run some regex's to convert common patterns and do the rest manually.
Guess the most work is converting preprocessor stuff.
May 24, 2012
Vic Kelson wrote:
> On Wednesday, 23 May 2012 at 15:27:54 UTC, Trass3r wrote:
> >You might want to check out https://github.com/cristicbz/scid
> 
> I had found scid. For some of my work, BLAS and LAPACK are fine (full matrices), and I can use it for small problems on this project. But for large problems, I need a sparse solver, like PetSC or other solvers.
> 
> THANKS!

Is it feasible to integrate a sparse solver as backend in SciD? This way sparse and dense operations are unified in one library.

Jens
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