[R] Problem and Question regarding R

Peter Dalgaard BSA p.dalgaard at biostat.ku.dk
Sun Aug 31 21:04:53 CEST 2003

bbals at t-online.de (Bernhard Bals) writes:

> Hi,
> I'm just about to install the Precompiled Binary Distribution of R
> from CRAN for SuSE Linux 8.2: R-base-1.7.1-1.i386.rpm
> My system is SuSE Linux 8.2 Professional Edition on a Pentium 4:
> # uname -a
> Linux linux 2.4.20-4GB #1 Mon Mar 17 17:54:44 UTC 2003 i686 unknown
> unknown GNU/Linux
> 1) Problem:
> I've tried to install the above base rpm archive with the command:
> # rpm -i R-base-1.7.1-1.i386.rpm
> error: failed dependencies:
>          libg2c.so.0 is needed by R-base-1.7.1-1
> There seems to be only one dependency missing (hope that's all). Since
> I've installed the Professional Edition with all the compilers and
> libraries, it's maybe only a naming problem.
> What's behind this missing library?
> Can this problem be fixed with a symbolic link pointing to a library
> that I already have on my system?
> Any experience with that?

As far as I remember, this happens if you haven't installed the
Fortran compiler (g77) since libg2c is part of that.
> Do you think I need or should compile and install R myself (not using
> one of the binary distributions)?

Wouldn't help (except in the sense that it would become more obvious
that a Fortran compiler is needed!)

> 2) Question:
> I want to use R not only interactively (issue commands after the
> prompt > ..), but also use some functionality of R from a Perl script.
> Can I use methods of R from a Perl script: Is there an interface from
> Perl (or at least from C/C++) to R (f.e. invoke R functions from Perl,
> C, C++ or some other language)?
> If so, can you please point me to the documentation on the Web or in
> literature where this is decribed?
> Do you have some demo Perl script (or C/C++ program) that uses this
> technique, f.e. calling R methods like "mean" or "standard deviation"?

http://www.omegahat.org/RSPerl . Be warned that these Omegahat packages
are sometimes not quite as stable as the regular CRAN family of
packages so some patchups can be required. Or maybe it will all just

   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907

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