[R] Ryacas not working properly

[Gabor Grothendieck]

I don't have a UNIX box but my reading of it is that it is
telling one how to enable telnet on the machine -- not
how to install a server -- and that once telnet is enabled
then the Ryacas package can make use of sockets
whereas without that such use of sockets is disabled.
Is that not right?


On 11/19/06, Paul Smith <phhs80 at gmail.com> wrote:
> On 11/19/06, Gabor Grothendieck <ggrothendieck at gmail.com> wrote:
> > Thanks, Marc.  I have placed a link to your post on the Ryacas home page.
> > Also, Ryacas 0.2-3 is now on Omegahat (as well as google groups).
>
> Apparently, the link
>
> "HowTo - Enable Telnet on Linux"
>
> at Ryacas site is misleading, as it suggests the installation of
> telnet-server and that is not necessary. See the discussion at
>
> http://groups-beta.google.com/group/comp.os.linux.networking/browse_thread/thread/2bb6a4c7a1167285/565dde88d7922659#565dde88d7922659
>
> Paul
>
>
>
>
> > On 11/19/06, Marc Schwartz <marc_schwartz at comcast.net> wrote:
> > > OK, after digging around for a couple of hours on this, thinking that
> > > this might be a firewall/SELinux/"On Demand Services" problem, I have, I
> > > think, nailed it down to two key things on FC6:
> > >
> > > 1. It requires the use of the '--enable-server' configure option for
> > > yacas itself.
> > >
> > > 2. There is a directory permissions problem in the Ryacas package,
> > > restricting a regular user's access to the files located in the 'yacdir'
> > > subdirectory.
> > >
> > > Note that in the instructions below, I also install the GSL, which
> > > presumably is not required, but I did it anyway after noting some
> > > warnings during the yacas build process.
> > >
> > > One other thing, which is that when downloading the Ryacas package from
> > > the Google site using Firefox, the file is downloaded as:
> > >
> > >  Ryacas_0.2 3.tar.gz
> > >
> > > Note the missing '-' between the 2 and 3.  Be sure to check for this
> > > when saving the tarball to disk.
> > >
> > >
> > > So here goes:
> > >
> > >
> > > 1. Install the GSL (including the devel RPM) as root:
> > >
> > >  yum install gsl*
> > >
> > >
> > >
> > >
> > > 2. Install yacas from the source tarball using:
> > >
> > >  ./ configure --enable-server
> > >  make
> > >
> > >  then as root:
> > >
> > >  make install
> > >
> > >
> > >
> > >
> > > 4. Install the Ryacas package as root:
> > >
> > >  R CMD INSTALL Ryacas_0.2-3.tar.gz
> > >
> > >
> > > Be sure that you also have the 'XML' package from CRAN installed, which
> > > is a dependency for Ryacas.
> > >
> > >
> > >
> > >
> > > 3. Change the permissions for /usr/local/lib/R/library/Ryacas/yacdir:
> > >
> > > Note that the default permission for this directory after installation
> > > is:
> > >
> > > drwxr--r-- 2 root root  4096 Nov 19 15:17 yacdir
> > >
> > >
> > > Thus:
> > >
> > >  su
> > >  chmod +x /usr/local/lib/R/library/Ryacas/yacdir
> > >
> > >
> > > Now:
> > >
> > > drwxr-xr-x 2 root root  4096 Nov 19 15:17 yacdir
> > >
> > >
> > >
> > > Now in R as a regular user:
> > >
> > > > library(Ryacas)
> > > Loading required package: XML
> > >
> > > > yacas("5/8 * 3/4")
> > > [1] "Starting Yacas!"
> > > Accepting requests from port 9734
> > > expression(15/32)
> > >
> > > > yacas("3/7 * 5/9")
> > > expression(5/21)
> > >
> > >
> > > HTH,
> > >
> > > Marc Schwartz
> > >
> > >
> > >
> >
> > ______________________________________________
> > R-help at stat.math.ethz.ch 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.
> >
>
> ______________________________________________
> R-help at stat.math.ethz.ch 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.
>