From r.hankin at noc.soton.ac.uk  Wed Jul 13 09:04:08 2005
From: r.hankin at noc.soton.ac.uk (Robin Hankin)
Date: Wed, 13 Jul 2005 08:04:08 +0100
Subject: [Rd] Computer algebra in R - would that be an idea??
In-Reply-To: <971536df05071218366de965e2@mail.gmail.com>
References: <C83C5E3DEEE97E498B74729A33F6EAEC01AD9A27@DJFPOST01.djf.agrsci.dk>
	<971536df05071218366de965e2@mail.gmail.com>
Message-ID: <164695F6-B36F-4DFC-8685-EF7A2E78509C@soc.soton.ac.uk>

Hi guys

another option would be David Gillespie's  "calc", which is written  
in emacs lisp.

This is a stable system with (AFAICS) as large user base.

Unfortunately, it doesn't seem to be actively developed, as the last  
stable version (2.02f)
appears to be 1996.  I don't know if this would be a contraindication.


Robin



On 13 Jul 2005, at 02:36, Gabor Grothendieck wrote:

> 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
>>
>>
>>
>>
>>
>>
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>

--
Robin Hankin
Uncertainty Analyst
National Oceanography Centre, Southampton
European Way, Southampton SO14 3ZH, UK
  tel  023-8059-7743



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