On Mon, Mar 3, 2008 at 4:37 PM, Rolf Turner <[EMAIL PROTECTED]> wrote: > > On 4/03/2008, at 10:38 AM, Ericka Lundström wrote: > > > On 03/03/2008, at 22.20, [EMAIL PROTECTED] wrote: > >> Is there a way to rename R objects? > >> I am looking for a way to rename objects > >> without making new objects. > >> > >> #For example: > >> x = c(1:40) > >> # I wish to use a function to rename x, already created, to y, > >> perhaps by > >> obj.rename(x,y) > >> # or > >> obj.rename("x","y") > > y <- x # changes x to y with same values. > > That makes a new object --- which is precisely what the enquirer > wanted ***NOT*** to do.
It doesn't though! > gc() used (Mb) gc trigger (Mb) max used (Mb) Ncells 133095 3.6 350000 9.4 350000 9.4 Vcells 87049 0.7 786432 6.0 478831 3.7 > a <- runif(1e7) > gc() used (Mb) gc trigger (Mb) max used (Mb) Ncells 133112 3.6 350000 9.4 350000 9.4 Vcells 10087364 77.0 11458389 87.5 10087374 77.0 > b <- a > gc() used (Mb) gc trigger (Mb) max used (Mb) Ncells 133117 3.6 350000 9.4 350000 9.4 Vcells 10087365 77.0 12111308 92.5 10087476 77.0 R will only create a copy if either of a or b is modified. Hadley -- http://had.co.nz/ ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.