Another approach might be to construct a wrapper for Aldor code, along the lines of .Fortran and .C. Aldor is the extension language for AXIOM http://www.aldor.org/, and there is a symbolic algebra library available for Aldor http://www-sop.inria.fr/cafe/Manuel.Bronstein/algebra, which ships with the Aldor compiler. Of course, I am much better at thinking up these ideas than implementing them myself. :-)
Simon. At 11:36 AM 13/07/2005, 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, Søren Højsgaard <[EMAIL PROTECTED]> 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 > > Søren > > > > ________________________________ > > > > Fra: Simon Blomberg [mailto:[EMAIL PROTECTED] > > Sendt: on 13-07-2005 01:52 > > Til: Duncan Murdoch; Gabor Grothendieck > > Cc: Søren Højsgaard; r-devel@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, Søren Højsgaard <[EMAIL PROTECTED]> 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@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@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
