Duncan,
Very nice tutorial. However it does NOT take away from the fact that _very_
simple_ scripts (like the one posted by Sun at the beginning of this
thread)
simply _fail_ in error under Rscript.
Whereas they don't under R or r.
The R environment ships an interpreter meant for command-line and scripting
use which fails on simple scripts that happen to use S4. But I am tired of
arguing for reversing this as I have gotten nowhere in all those years.
Dirk
--
http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org