base
,
stats
, graphics
etc. to act as a jail for
later evaluation.
sandbox.env(blacklist = as.character(unlist(commands.blacklist())))
stop
s by default (to
prevent using those inside the environment), for a full
list see commands.blacklist
. Other
functions (found in package's namespace) behaves
differently then usual: some parameters are forbidden
(like eval
's env
) to prevent breaking out
from the sandbox, some parameters and returned values are
checked for "malicious" signs.