renaming objects
On 4/03/2008, at 11:48 AM, hadley wickham wrote:
On Mon, Mar 3, 2008 at 4:37 PM, Rolf Turner <r.turner at auckland.ac.nz> wrote:
On 4/03/2008, at 10:38 AM, Ericka Lundstr?m wrote:
On 03/03/2008, at 22.20, Giles.Crane at doh.state.nj.us 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.
Well RMIHATMTTL!!! R is even cleverer than I thought!!! cheers, Rolf ###################################################################### Attention: This e-mail message is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Any views or opinions presented are solely those of the author. This e-mail has been scanned and cleared by MailMarshal www.marshalsoftware.com ######################################################################