Ben,
POSIX level / glibc level variables are set at process start and AGAIK cannot
really be altered after start. They clearly work when set _before_ calling
sqrt(-1):
$ LANGUAGE=es Rscript -e 'sqrt(-1)'
[1] NaN
Warning message:
In sqrt(-1) : Se han producido NaNs
$ LANGUAGE=de Rscript -e 'sqrt(-1)'
[1] NaN
Warnmeldung:
In sqrt(-1) : NaNs wurden erzeugt
$
I think the `callr` package can help you with this use from with R by
effectively spawning a new process for you. Or, lower-level, you can call
`system()` or `system2()` yourself and take care of the setup.
Cheers, Dirk
--
dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org
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