There is also Sage (<a href="http://www.sagemath.org./">http://www.sagemath.org./</a>) that was featured in a recent Slashdot post (<a href="http://science.slashdot.org/article.pl?sid=07/12/08/1350258">http://science.slashdot.org/article.pl?sid=07/12/08/1350258 </a>) recently.  It is based on Python, but it would be nice to have a similar open-source capability for PLT Scheme.  I haven't played with it, but I'm downloading it now.  I'd love to upgrade the science collection and PLoT along these lines.  I would rather have a pure open-source solution.  The commercial solutions like Mathematica are rather expensive for those of us doing this on our own outside of the academic community. Doug <div class="gmail_quote">On Dec 11, 2007 2:27 PM, Robby Findler <<a href="mailto:robby@cs.uchicago.edu">robby@cs.uchicago.edu</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> ?? Robby <div><div></div><div class="Wj3C7c"> On Dec 11, 2007 1:10 PM, Chongkai Zhu <<a href="mailto:czhu@cs.utah.edu">czhu@cs.utah.edu</a>> wrote: > Bill Wood wrote: > > On Tue, 2007-12-11 at 10:21 -0700, Chongkai Zhu wrote: > >    . . . > > > >> When it comes to "interact with Scheme", then (I suppose you want a > >> computer algebra system here) there is Maxima/Axiom/Mathematica/JACAL > >> for choice (please remind me if there is more). Maxima and Axiom are > >> writtem in Lisp. I don't know much about Axiom. Maxima can interact with > >> (Common) Lisp quite well. But actual development of both has been a stop > >> for 15 years (or more). ... > >> > > > > Open-source versions of both Maxima and Axiom are under active > > development right now. > > > > For maxima see > > > >     <a href="http://maxima.sourceforge.net/" target="_blank">http://maxima.sourceforge.net/</a> > > > > and for Axiom see > > > >     <a href="http://axiom-wiki.newsynthesis.org/FrontPage" target="_blank"> http://axiom-wiki.newsynthesis.org/FrontPage</a> > > > >  -- Bill Wood > > > > I know. But I call that maintaining instead of developing. > > Chongkai > > > _________________________________________________ >   For list-related administrative tasks: >   <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme" target="_blank">http://list.cs.brown.edu/mailman/listinfo/plt-scheme </a> > _________________________________________________  For list-related administrative tasks:  <a href="http://list.cs.brown.edu/mailman/listinfo/plt-scheme" target="_blank">http://list.cs.brown.edu/mailman/listinfo/plt-scheme </a> </div></div></blockquote></div>