Hello yet again, R People: I was working with Ryacas and yacas last night and all was well. Now this morning, I keep getting the following:> a <- Sym("a") > aError in summary.connection(x) : invalid connection>When I go to yacas from the command line, it works fine. Any suggestions, please? I'm thinking that a port might be open, but here I have:> showConnections()description class mode text isopen can read can write>I'm working with R-3.0.1 on Windows 7. Thanks, Erin -- Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: erinm.hodgess@gmail.com [[alternative HTML version deleted]]
Dear Erin, I don't have solution, but there is a remark on connection issues at http://code.google.com/p/ryacas/ An alternative could be to look at the rSymPy or rmathpiper packages which may do what you want. Regards S?ren -----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Erin Hodgess Sent: 19. juni 2013 17:50 To: R help Subject: [R] Ryacas loads but yacas has an error Hello yet again, R People: I was working with Ryacas and yacas last night and all was well. Now this morning, I keep getting the following:> a <- Sym("a") > aError in summary.connection(x) : invalid connection>When I go to yacas from the command line, it works fine. Any suggestions, please? I'm thinking that a port might be open, but here I have:> showConnections()description class mode text isopen can read can write>I'm working with R-3.0.1 on Windows 7. Thanks, Erin -- Erin Hodgess Associate Professor Department of Computer and Mathematical Sciences University of Houston - Downtown mailto: erinm.hodgess at gmail.com [[alternative HTML version deleted]] ______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
On Wed, Jun 19, 2013 at 11:50 AM, Erin Hodgess <erinm.hodgess at gmail.com> wrote:> Hello yet again, R People: > > I was working with Ryacas and yacas last night and all was well. > > Now this morning, I keep getting the following: > >> a <- Sym("a") >> a > Error in summary.connection(x) : invalid connection >> > > When I go to yacas from the command line, it works fine. > > Any suggestions, please? > > I'm thinking that a port might be open, but here I have: >> showConnections() > description class mode text isopen can read can write >> > > I'm working with R-3.0.1 on Windows 7. >I am running Ryacas using R 3.0.1 on Windows 8 so its unlikely it does not run on Windows 7. Read the troubleshooting section on the home page. http://ryacas.googlecode.com -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com