On 6/1/07, Mike Meredith <[EMAIL PROTECTED]> wrote: > > > Thanks very much to all of you. It looks like 'match.call' is the key, and > both Brian's and Gabor's solutions work fine. --- Mike.
Brian's is shorter but I think the one in my post is a bit more robust: > f1 <- function(...) { + m <- as.list(match.call(expand.dots=TRUE))[-1] + nm <- names(m) + for(i in seq_along(m)) if(!nchar(nm[i])) nm[i] <- deparse(m[[i]]) + nm + } > > f2 <- function(...) { + x <- list(...) + if (is.null(names(x))) names(x) <- "" + names(x)[names(x) == ""] <- NA + mc <- match.call()[-1] + ifelse(is.na(names(x)), as.character(mc), names(x)) + } > > f1(sin, cos) Error in if (!nchar(nm[i])) nm[i] <- deparse(m[[i]]) : argument is of length zero > f2(sin, cos) [1] "sin" "cos" ______________________________________________ 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.