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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Ann: Mathpaqs, release Feb. 2011
Newsgroups: comp.lang.ada
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Date: Tue, 22 Feb 2011 12:33:06 +0100
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Date: 2011-02-22T12:33:06+01:00
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On Tue, 22 Feb 2011 02:40:17 -0800, Nasser M. Abbasi wrote:

> On 2/22/2011 2:27 AM, Dmitry A. Kazakov wrote:
> 
>>> Is it possible to do something like this in Ada? There are number
>>> of sparse libraries out there, but googling around, do not see
>>> an Ada binding at this time.
> 
>> Do you see MATLAB bindings instead? You seem comparing MATLAB libraries
>> with non-Ada ones.
> 
> I was really asking a simple question :)

It is not a simple question, or I didn't understand you. Sparse matrices is
a huge research area with an uncounted number of algorithms and their
implementations.

> In Ada, how can one work with sparse matrices? Say I want to make Ax=b,
> where A is sparse, and solve for x.

Ax=b is an equation. Both Ada and MATLAB are imperative languages, you
cannot "make" equations there. 

> How would you do that in Ada 2005? What libraries/bindings etc... does
> one need to use.

Whatever library that solves the problem of this class with the required
size and accuracy. Either you find a library or write it by yourself. That
has little to do with the language. Except that it would be difficult to
implement anything efficiently in MATLAB. MATLAB plug-ins are normally
written not in MATLAB itself.

> Using Sparse matrices is so common in matlab world, since it is build-in,
> and I was just giving an example, that is all.

Sparse matrices are impossible to build in. It is only possible to do
certain categories of sparse matrices. I don't know which ones MATLAB has.
Are you asking why Ada does not include them in the standard library?

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de