or use
#not checked
rm(setdiff(ls(),c("a", "b"))
On Aug 24, 2010, at 4:55 AM, Barry Rowlingson wrote:
2010/8/24 500600 <romu...@gmail.com>:
a <- 1
b <- 2
c <- 3
ls()[-a] # set minus to all the objects you want to retain
rm(list = ls()[-a] # will remove all the objects - except a
ls() # presto
Only because a=1 and a is the first item in the list! Not because you
are doing '-a'! If a is 0 then nothing gets deleted, and if a isn't
numeric vector then it just fails.
If you want to do it by name, use match....
Barry
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