To the OP:
Sooner or later most R beginners are bitten by this all too
convenient shortcut. As an R newbie, think of R as your
bank account: overuse of $-extraction can lead to undesirable
consequences. It's best to acquire the '[[' and '[' habit early.
Peter Ehlers
On 2013-03-25 12:43, Bert Gunter wrote:
Hello Starter
Before posting, please read relevant Help files!
?"$"
where it tells you:
"x$name is equivalent to x[["name", exact = FALSE]]. Also, the partial
matching behavior of [[ can be controlled using the exact argument."
..etc.
-- Bert
On Mon, Mar 25, 2013 at 12:21 PM, Andrew Lin <hlin0...@gmail.com> wrote:
Hi folks,
I am starter for R. While I tried list as following:
l <- list()
l$foo
NULL
l$foobar <- 1
l$foo
[1] 1
Apparently, foo and foobar are different name for elements in list
(actually
foo does not exist). But why they are sharing same value?
Thanks a lot!
Max
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and provide commented, minimal, self-contained, reproducible code.
