[R] [Rd] R as shell script
pinard at iro.umontreal.ca
Fri Jul 14 19:17:08 CEST 2006
Hello, Juha. Your request, quoted below, is likely more appropriate for
R help than for R devel, so I'm redirecting this reply there.
>I am considering if I should invest in learning R. Based on the
>language definition and introductory documents, it seems nice. But now
>I am faced with a problem: I want to be able to run R programs easily
>from the unix shell, and write scripts that can automatically select R
>as the interpreter:
>This of course doesn't work, because /usr/bin/R is a shell script.
>I have been able to create a binary wrapper that calls R with the
>correct arguments, which is documented here:
>This still lacks eg. standard input (but I have no idea how I can
>implement it in R) and full command line argument passing (can be
>done), but am I on the right track, or is there already something that
>does what I need?
I'm often using something like:
R --slave --vanilla <<EOF
# Your R source code goes here!
Within your script, shell substitution for $1, etc., will occur. So
with a bit of imagination, you can do about anything :-). Simple
enough! Make sure you `cat' or `print' explicitly whatever has to be
written on standard output: for one, I usually prefer full control in
scripts over automatic printing of given expressions.
François Pinard http://pinard.progiciels-bpi.ca
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