From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: 103376,80532c203ced41ef
X-Google-NewGroupId: yes
X-Google-Attributes: gida07f3367d7,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news2.google.com!npeer03.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!nntp.club.cc.cmu.edu!feeder.erje.net!newsfeed.freenet.ag!news.netcologne.de!ramfeed1.netcologne.de!newsfeed.arcor.de!newsspool1.arcor-online.net!news.arcor.de.POSTED!not-for-mail
From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Ann: Mathpaqs, release Feb. 2011
Newsgroups: comp.lang.ada
User-Agent: 40tude_Dialog/2.0.15.1
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Reply-To: mailbox@dmitry-kazakov.de
Organization: cbb software GmbH
References: <ac4a1eb6-454a-4814-b97f-b6a8294df9dc@b8g2000vbi.googlegroups.com>
 <ijuu8r$frj$1@speranza.aioe.org>
 <838f49da-9a83-49d1-b42e-64b45f9b2917@x13g2000vbe.googlegroups.com>
 <ik018g$tgq$1@speranza.aioe.org>
Date: Tue, 22 Feb 2011 11:27:09 +0100
Message-ID: <1ib2wlicecaim$.1o25nuvllws3i.dlg@40tude.net>
NNTP-Posting-Date: 22 Feb 2011 11:27:07 CET
NNTP-Posting-Host: c373b098.newsspool1.arcor-online.net
X-Trace: 
 DXC=dK3HT`B\cNig`45cDR8l?oic==]BZ:afn4Fo<]lROoRa<`=YMgDjhgbniX0T=6Vh`h[6LHn;2LCVn[<mhadbfdUk\B@<[1RcgRdNoSmSK@[_:d
X-Complaints-To: usenet-abuse@arcor.de
Xref: g2news2.google.com comp.lang.ada:18506
Date: 2011-02-22T11:27:07+01:00
List-Id: <comp.lang.ada>

On Tue, 22 Feb 2011 01:56:30 -0800, Nasser M. Abbasi wrote:

> What packages or binding to which library should one use in Ada
> to use sparse matrices?

That depends on the type of sparseness, I guess.

> In Matlab, almost all build-in functions that work with normal matrices,
> also work as in with sparse matrices. Makes life very easy.
> 
> To solve Ax=b, even when A is sparse, one can still write A\b.

I don't understand the problem here. You can define a function

   function "/" (Left : My_Sparse_Matrix; Right : Vector) return Vector;

It is not very common because solver usually returns some additional
valuable information, which gets lost when the solver is wrapped into a
function.

> 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.

BTW, writing MATLAB bindings is much more complicated than doing Ada
bindings.

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