On Aug 26, 2009, at 11:35 PM, Ning Ma wrote:
Hi, everybody. I have a list obj L, sth like
$`aaa`
[1] "5753"
if the string 'aaa' is a returned value of a function foo(). what is
the right syntax form of L$foo()
What do you really want to achieve or to learn? Pretty much anything
ending in () will be seen as a function and it does not appear that
you have a function inside L.
> L <-list()
> L$aaa <- 5753
> L$aaa <- "5753"
> L
$aaa
[1] "5753"
Note that aaa, which is a valid object name, does not have surrounding
back-quotes as in your question. And even if you created an aaa
portion of L using backquotes they would not be displayed that way:
> L <-list()
> L$`aaa` <- "5753"
> L
$aaa
[1] "5753"
If you constructed an invalid object name within back-quotes you might
see them later:
> L <-list()
> L$`5753` <- "5753"
> L
$`5753`
[1] "5753"
So what is your real question and what does str(L) report?
--
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
______________________________________________
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.
