Hi guys.
I recently stumbled on an unexpected behavior of R when using
functions created in a loop.
The problem is silly enough to me that I had hard time choosing a good
mail subject, not talking about searching in the archives...
After some experiments, I trimmed down the following minimal
reproducible example:
#######
makeF <- function(i) function() i
fList <- list(makeF(1), makeF(2))
sapply(fList, do.call, list())
##This works as expected (by me...):
#[1] 1 2
##Things go differently when creating functions in a for loop:
for(i in 1:2)
fList[[i]] <- makeF(i)
sapply(fList, do.call, list())
#[1] 2 2
##Same result with "lapply":
fList <- lapply(as.list(1:2), makeF)
sapply(fList, do.call, list())
#[1] 2 2
#######
I evidently overlook some important detail, but I still can't get it.
Somebody can explain me what's happening there?
Bests,
antonio.
> R.version
_
platform i686-pc-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status Patched
major 2
minor 8.0
year 2008
month 12
day 04
svn rev 47063
language R
version.string R version 2.8.0 Patched (2008-12-04 r47063)
--
Antonio, Fabio Di Narzo
Ph.D. student at
Department of Statistical Sciences
University of Bologna, Italy
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