From ggrothendieck at gmail.com  Wed Jul 13 03:36:12 2005
From: ggrothendieck at gmail.com (Gabor Grothendieck)
Date: Tue, 12 Jul 2005 21:36:12 -0400
Subject: [Rd] Computer algebra in R - would that be an idea??
In-Reply-To: <C83C5E3DEEE97E498B74729A33F6EAEC01AD9A27@DJFPOST01.djf.agrsci.dk>
References: <C83C5E3DEEE97E498B74729A33F6EAEC01AD9A27@DJFPOST01.djf.agrsci.dk>
Message-ID: <971536df05071218366de965e2@mail.gmail.com>

I don't know which free system is best.  I have mainly used Yacas
but my needs to date have been pretty minimal so I suspect
any of them would have worked.

Eric's COM solution, once I have it figured out, will likely get me
to the next step on Windows.  I did some googling around and
found this:

http://www.koders.com/python/fidDCC1B0FBFABC770277A28835D5FFADC9D25FF54E.aspx

which is a python interface to Yacas which may give some ideas
on how to interface it to R.


On 7/12/05, S?ren H?jsgaard <Soren.Hojsgaard at agrsci.dk> wrote:
> Personally, I like Maxima better than Yacas, but in both cases the solution (at least a minimal one) should be doable: A small program which pipes R commands into a terminal running Maxima/Yacas and taking the output back into R. I am not much into the technical details, but isn't that what can be done with the COM automatation server on Windows?? (I don't know what the equivalent would be on unix?).
> Best regards
> S?ren
> 
> ________________________________
> 
> Fra: Simon Blomberg [mailto:Simon.Blomberg at anu.edu.au]
> Sendt: on 13-07-2005 01:52
> Til: Duncan Murdoch; Gabor Grothendieck
> Cc: S?ren H?jsgaard; r-devel at stat.math.ethz.ch
> Emne: Re: [Rd] Computer algebra in R - would that be an idea??
> 
> 
> 
> I would use such a symbolic math package for R. I have dreamt of an
> open-source solution with functionality similar to mathStatica.
> http://www.mathstatica.com/ Is yacas the best system to consider? What
> about  Maxima http://maxima.sourceforge.net/, which is also GPL, or maybe
> Axiom http://savannah.nongnu.org/projects/axiom, which has a modified BSD
> license?
> 
> Cheers,
> 
> Simon.
> 
> At 01:25 AM 13/07/2005, Duncan Murdoch wrote:
> >On 7/12/2005 10:57 AM, Gabor Grothendieck wrote:
> > > On 7/12/05, S?ren H?jsgaard <Soren.Hojsgaard at agrsci.dk> wrote:
> > >> >From time to time people request symbolic computations beyond what
> > D() and deriv() etc can provide. A brief look at the internet shows that
> > there are many more or less developed computer algebra packages freely
> > available. Therefore, I wondered if it would be an idea to try to
> > 'integrate' one of these packages in R, which I guess can be done in more
> > or less elegant ways... I do not know any of the computer algebra people
> > around the World, but perhaps some other people from the R-community do
> > and would be able to/interested in establishing such a connection...
> > >
> > >
> > > Coincidentally I asked the yacas developer about this just yesterday:
> > >
> > http://sourceforge.net/mailarchive/forum.php?thread_id=7711431&forum_id=2216
> >
> >It sounds like developing an R package to act as a wrapper would be the
> >best approach.  I didn't see documentation for their API (the exports of
> >their DLL), but I didn't spend long looking.
> >
> >Duncan Murdoch
> >
> >______________________________________________
> >R-devel at r-project.org mailing list
> >https://stat.ethz.ch/mailman/listinfo/r-devel
> 
> Simon Blomberg, B.Sc.(Hons.), Ph.D, M.App.Stat.
> Centre for Resource and Environmental Studies
> The Australian National University
> Canberra ACT 0200
> Australia
> T: +61 2 6125 7800 email: Simon.Blomberg_at_anu.edu.au
> F: +61 2 6125 0757
> CRICOS Provider # 00120C
> 
> 
> 
> 
>



[Rd] Computer algebra in R - would that be an idea??
Gabor Grothendieck