See also the "nameargs" function on p. 46 of V&R's S PROGRAMMING . As previous posts indicated, further fiddling would be necessary to get exactly what you want, and there's probably no universal clean solution.
Bert Gunter Nonclinical Statistics 7-7374 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gabor Grothendieck Sent: Thursday, October 25, 2007 9:12 PM To: Andrew Smith Cc: [EMAIL PROTECTED] Subject: Re: [R] Deparsing part of a list argument Check out: http://tolstoy.newcastle.edu.au/R/e2/help/06/10/2242.html On 10/25/07, Andrew Smith <[EMAIL PROTECTED]> wrote: > Here's a simple example of the type of function I'm trying to write, > where the first argument is a list of functions: > > myfun <- function(funlist, vec){ > tmp <- lapply(funlist, function(x)do.call(x, args = list(vec))) > names(tmp) <- names(funlist) > tmp > } > > > myfun(list("Summation" = sum, prod, "Absolute value" = abs), c(1, 4, 6, 7)) > $Summation > [1] 18 > > [[2]] > [1] 168 > > $`Absolute value` > [1] 1 4 6 7 > > > What I would like is for the names of the result to be the same as the > names of funlist (as is the case in components 1 and 3 above), but if > some components of funlist are unnamed, I would like the default name > in the result to be the name of the actual function used. So in the > above example, I want the name of the second component to default to > 'prod', since funlist[[2]] has no name. > > But the problem is that I can't get the function names corresponding > to the unnamed elements of funlist by using the usual > deparse(substitute)) trick, since they're part of a list which is > treated as one big argument. So deparse(substitute(funlist)) just > gives me one big character string of all the functions, and I'm not > sure how I can use that to get just the functions that aren't named. > Any ideas? > > Thanks, > Andrew > > ______________________________________________ > 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. > ______________________________________________ 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. ______________________________________________ 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.
