[R] New project: littler for GNU R
ggrothendieck at gmail.com
Tue Sep 26 23:15:36 CEST 2006
The way it should work IMHO is that one can write any of these
(in analogy to awk/perl/etc.):
R -f myprog.R mydata.dat
R -f myprog.R < mydata.dat
cat mydata.dat | R -f myprog.R # or analogously on Windows
R -e "...some.R.code... " mydata.dat
R -e "...some.R.code... " < mydata.dat
and there should be a simple way for myprog.R to read the
input data that does not require that it know whether it
was specified on the command line or redirected.
On 9/26/06, Richard M. Heiberger <rmh at temple.edu> wrote:
> I like this plan and have now played with the concept. I did the following
> on Windows in cygwin. It would also work in Unix, and I think could be tickled
> to work on the standard MS cmd line in Windows. It would certainly work
> on Windows with a Windows-native port of the basic unix utilities.
> echo 'options(echo=FALSE);cat(pi^2,"\n")' | Rterm --no-save
> This produces an output file, that normally shows up in the *shell*
> buffer, but could be redirected. The obvious place to redirect it to is
> awk with a script to filter out everything above the echo of the options()
> The only change to R needed to remove the need for an awk script
> is to suppress the display of the copyright message and startup
> information. I suppose that could be done with a new
> --suppress-startup-info argument to Rterm.
> The other optimizations that Jeffrey and Dirk have, such as
> suppressing the loading of many of the standard packages,
> would also need to be done.
> Very good work and concept.
> R-help at stat.math.ethz.ch mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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