Ales Ziberna <[EMAIL PROTECTED]> writes:
> I am also very interested how this could be done, possibly in such a
> way that this would be incorporated in the function itself and there
> wouldn't be a need to write "environment(f) <- NULL" before calling a
> function, as is proposed in the reply below and in a thread a few days
> ago!
Notice BTW, that environment(f) <- NULL may have unexpected
consequences. What it really means is that the lexical scope of f
becomes the base package. This interpretation of NULL may change in
the future, since it is somewhat illogical and it has a couple of
undesirable consequences that there's no way to specify a truly empty
environment. So
a) if you're calling a function outside of the base package, you get
the effect of
> f <- function(){mean(rnorm(10))}
> environment(f)<-NULL
> f()
Error in mean(rnorm(10)) : couldn't find function "rnorm"
b) even if it does work now, it may be broken by a future change to R.
Notice that *all* functions contain unbound variables in the form of
functions so if we get an empty NULL environment, even "<-" may stop
working.
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907
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