Haskell Matrix Library...

Jan-Willem Maessen jmaessen at alum.mit.edu
Fri Jun 10 10:50:01 EDT 2005

On Jun 10, 2005, at 6:33 AM, Keean Schupke wrote:

> [Making Matrices work in Haskell]...
> I seems easier to use FFI and LAPACK for the more complex matrix
> operations...

And it'll be tough to impossible to match, say, FFTW and Atlas in 
Haskell.  FFTW at least uses the C compiler like an assembler.

> anyone know how to marshall data
> for Fortran?

Find something with a C interface and use that.  Most LAPACK and BLAS 
libraries should have a C binding.  My understanding is that Fortran 
dope vector formats are not standard, though the latest versions of the 
Fortran standard aim to fix that non-portability problem.

-Jan-Willem Maessen

>     Keean.

PS - I had the following code kicking around, written with the hope of 
specializing the Matrices for maximal unboxing (thus the use of 
constructors with explicit type signatures, which may not be strictly 
necessary anymore).  Is this useful to anyone?  No FFI here, it's all 
just Haskell code, but using an FFI binding instead wouldn't be hard.
I'd been hoping to push more towards specialized matrix representations 
(sparse, banded, upper/lower triangular), to see how ugly the code 
would get.  And of course there should be "solve" and "decompose" 
routines of various sorts.

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