[plt-scheme] missing gsl scientific libraries

From: Atmam Ta (atmamta at gmail.com)
Date: Fri Aug 15 11:20:40 EDT 2008

thanks for the replies, and the packages that you contributed.
sorry for airing my temporary frustration - I should have paid more
attention to what was in that gsl port back in the day. I would have chosen
plt-scheme anyway - I hardly consider octave, matlab, c, etc. languages...
If I end up expanding plt, I will definitely post the result to Planet.

On Fri, Aug 15, 2008 at 4:48 PM, Doug Williams <m.douglas.williams at gmail.com
> wrote:

> I took a different approach in the science collection.  I actually
> reimplemented the code entirely in PLT Scheme.  This is almost certainly
> slower than an FFI interface to the C code - but it is much faster in V4
> where the JIT compiler deals with floating point directly.  [Matthew can
> correct me if I got the details wrong there.]  But, it allows me to better
> integrate with the (PLT) Scheme numerical hierarchy, error handling, etc.
> So, it takes me more on the order of a week to port a moderately complex
> unit of functionality.
> I avoided porting the linear algebra routines until I get a better
> underlying array abstraction implemented.  I've already prototyped one that
> sits on top of SRFI 4 homogeneous vector types.  [Basically a homogeneous
> array is mapped onto an appropriate vector type; array references can
> include various slicing operations, effecient reuse of underlying vectors
> (avoids copying), and array operations can also return slices, etc.]  I also
> need to interface it with the new iterators in V4.  But, I haven't been able
> to devote as much time to it as I'd like.
> Anyway, adding the appropriate FFI interfaces to Will's code base would be
> much quicker.
> If you, or anyone else, wants to add to the science collection, it is
> hosted on the Schematics project at Sourceforge.  [Or, of course, the code
> is on PLaneT.]
> Doug
> On Fri, Aug 15, 2008 at 8:18 AM, Will Farr <farr at mit.edu> wrote:
>> Atmam,
>> I wrote the mzgsl package, and, as Doug said with the science collection,
>> I only wrapped the functionality I needed at the time.  It was my hope that
>> people who needed more from the GSL would add to the package as necessary.
>> For linear algebra (i.e. bindings to LAPACK and BLAS), Noel encouraged you
>> to take a look at the plt-linalg package, and I second that (I wrote that
>> one, too, with some help from Noel and others).
>> If you would like to wrap the GSL functionality you need, I would
>> encourage you to add to the current mzgsl package.  If you would like, I'd
>> be happy to give you my Darcs repository for that code and pull patches back
>> from you to add to PLaneT (i.e. if you don't want to be bothered with the
>> details of releasing the code).  PLT's foreign function interface is really
>> easy to use (the existing mzgsl code should give you a good idea how it
>> works, and, of course, the help-desk documentation is excellent); writing
>> the initial version of the mzgsl package, which contained all the current
>> functionality, took me about two hours.
>> Will
>> On Aug 15, 2008, at 7:58 AM, Atmam Ta wrote:
>>  Hi,
>>> when I chose the language for my current project a few months ago I had
>>> some "must have" requirements in mind, like the language should have basic
>>> scientific computing support (matrix and linear algebra, fft, least squares
>>> fitting and some statistics packages).
>>> After scanning the Planet repository, I thought plt-scheme passes as it
>>> had an interface to the Gnu Scientific Library listed. Now I am very
>>> surprised to see that the mzgsl library contains only an interface to the
>>> random number generation sublibrary of GSL, and the science collection has
>>> less than half of the GSL functionality.
>>> Does anyone know of plt-scheme interace code to fft, linear algebra,
>>> least-squares fitting, and non-basic statistics? I can see that there is a
>>> "fit" function in the plot library for least squares fitting...
>>> Cheers,
>>> Atmam
>>> _________________________________________________
>>>  For list-related administrative tasks:
>>>  http://list.cs.brown.edu/mailman/listinfo/plt-scheme
>> _________________________________________________
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