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<div class="moz-cite-prefix">Well, I was reacting to the "currently
there is no planned work to port external toolboxes by ESI"
because some of the actual *decent* internal computational stuff
in Scilab (e.g. UMFpack) was initially developped as an external
toolbox (by B. Pincon). As far as optimization stuff is concerned,
the Sci_ipopt+Fmincon atoms packages should be considered by ESI.
<br>
<br>
The problem is that some users (like me) keep trying to solve not
"common use-cases" problems with Scilab. The last two cases where
I had to use something else than optim are :<br>
<br>
1-a non-linear optimization problem with linear inequality
constraints (not that complicated, but optim does no handle this)
where I had to switch to cfsqp (but stayed with Scilab here)<br>
2-a difficult optimization problem where an interior-point method
was the only successful one (here I had to switch to Matlab,
sorry)<br>
<br>
I could give you other cases where some computational internals of
Scilab are a bit outdated. In the past 10 years the focus has been
made on things that are visible (interface, graphics, widgets,
...) and recently on language internals and much more. However, I
think that the time has come to also update the stuff that would
allows to do serious applied mathematics and not just solve
"common use-cases". I hope that Scilab's future now depends on ESI
is a good news.<br>
<br>
Stéphane Mottelet <br>
<br>
<br>
Le 03/04/2017 à 09:44, Pierre Vuillemin a écrit :<br>
</div>
<blockquote
cite="mid:ff2655721171c55f31318d8151c539e2@pierre-vuillemin.fr"
type="cite">
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<div class="pre" style="margin: 0; padding: 0; font-family:
monospace">While it is not internal (and not necessarily decent
at this point ^^), I am developing a <a moz-do-not-send="true"
href="https://github.com/pivui/sopi">toolbox for optimization</a>
in Scilab. Its aim is firstly to provide a convenient way to
formulate optimization problems.</div>
<div class="pre" style="margin: 0; padding: 0; font-family:
monospace"> </div>
<div class="pre" style="margin: 0; padding: 0; font-family:
monospace">It is currently very limited (mainly <a
moz-do-not-send="true"
href="https://github.com/pivui/sopi/blob/master/demos/sopi_demo_LP.sce">dense
linear optimization problems</a> + some quadratic problems)
and paused due to some porting issue with Scilab 6...but still,
it may be usable at some point in the future :).</div>
<div class="pre" style="margin: 0; padding: 0; font-family:
monospace"> </div>
<div class="pre" style="margin: 0; padding: 0; font-family:
monospace">Regards,</div>
<div class="pre" style="margin: 0; padding: 0; font-family:
monospace"> </div>
<div class="pre" style="margin: 0; padding: 0; font-family:
monospace">Pierre</div>
<div class="pre" style="margin: 0; padding: 0; font-family:
monospace"><br>
<br>
Le 03.04.2017 09:30, Clément David a écrit :
<blockquote type="cite" style="padding: 0 0.4em; border-left:
#1010ff 2px solid; margin: 0">Hi Stéphane,<br>
<br>
Le lundi 03 avril 2017 à 08:53 +0200, Stéphane Mottelet a
écrit :
<blockquote type="cite" style="padding: 0 0.4em; border-left:
#1010ff 2px solid; margin: 0">BTW are there plans to port a
*decent* and internal optimization package ?</blockquote>
<br>
Why not but what do you mean by *decent* ? using an external
solver ?<br>
<br>
IMHO Optimization is a wide topic where there is a lot of
different<br>
solvers available. The current<br>
Scilab implementation might not be sufficient for all needs
but cover<br>
some of the common use-cases.<br>
<br>
--<br>
Clément<br>
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<p><br>
</p>
<pre class="moz-signature" cols="72">--
Département de Génie Informatique
EA 4297 Transformations Intégrées de la Matière Renouvelable
Université de Technologie de Compiègne - CS 60319
60203 Compiègne cedex</pre>
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