On 12-07-26 3:55 PM, Gabor Grothendieck wrote:
This code which has worked for years in R but fails under R-devel:
R.version.string
[1] "R Under development (unstable) (2012-07-25 r59963)"
n <- 3
f <- function(x) {}
formals(f) <- rep(formals(f), n) ##
Error in rep(formals(f), n) : replication of pairlists is defunct
The message suggests that the change was intentional.
Why was this functionality removed?
What code should be used in its place?
rep() on a pairlist didn't return a pairlist, it coerced to a list and
then rep'd that. So you could do the same explicitly if that's what you
really want:
formals(f) <- rep(as.list(formals(f)), n)
This works because the formals<- code is forgiving; other uses of
pairlists would not accept the result of rep on a pairlist.
Duncan Murdoch
______________________________________________
R-devel@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel
