See ?match.call On 7/27/06, Armstrong, Whit <[EMAIL PROTECTED]> wrote: > I see that plot.default uses deparse(substitute(x)) to extract the > character name of an argument and put it on the vertical axis. > > Hence: > foo <- 1:10 > plot( foo ) > > will put the label "foo" on the vertical axis. > > However, for a function that takes a "..." list as an input, I can only > extract the first argument name: > > x <- 1:10 > y <- 10:20 > > foo <- function(...) { > print(deparse(substitute(...))) > } > > foo(x,y) > > returns: > > > foo(x,y) > [1] "x" > > > > and when I try to convert the list to a local variable and then extract > names, that doesn't work either: > > x <- 1:10 > y <- 10:20 > > foo <- function(...) { > > x <- list(...) > print(deparse(substitute(names(x)))) > } > > foo(x,y) > > returns: > > > foo(x,y) > [1] "names(list(c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10), c(10, 11, 12, 13, " > [2] "14, 15, 16, 17, 18, 19, 20)))" > > > > > Can someone suggest a way to extract the variable names when they are > passed as a list via "..." ? > > Thanks, > Whit > > > > > This e-mail message is intended only for the named recipient(s) above. It may > contain confidential information. If you are not the intended recipient you > are hereby notified that any dissemination, distribution or copying of this > e-mail and any attachment(s) is strictly prohibited. If you have received > this e-mail in error, please immediately notify the sender by replying to > this e-mail and delete the message and any attachment(s) from your system. > Thank you. > > > > ______________________________________________ > R-help@stat.math.ethz.ch 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. > > >
______________________________________________ R-help@stat.math.ethz.ch 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.