[R] Ryacas not working properly

[Paul Smith]

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
> >
> >
> >
>
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