From Soren.Hojsgaard at agrsci.dk  Wed Jul 13 02:45:28 2005
From: Soren.Hojsgaard at agrsci.dk (=?iso-8859-1?Q?S=F8ren_H=F8jsgaard?=)
Date: Wed, 13 Jul 2005 02:45:28 +0200
Subject: [Rd] Computer algebra in R - would that be an idea??
Message-ID: <C83C5E3DEEE97E498B74729A33F6EAEC01AD9A27@DJFPOST01.djf.agrsci.dk>

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