Hi Mike, On 07/22/2015 04:13 PM, Michael Love wrote:
it's slightly annoying to writefoo <- function(x) { if ( ! is.numeric(x) ) stop("x should be numeric") if ( ! length(x) == 2 ) stop("x should be length 2") c(x[2], x[1]) }
That's a little bit kind of what stopifnot() is for: stopifnot(is.numeric(x) && length(x) == 2) The error message you get is not perfect English but is very concise: > foo(letters) Error: is.numeric(x) && length(x) == 2 is not TRUE H.
i wonder if we could have some core functions that test the class and the length in one and give the appropriate stop message. maybe this exists already -Mike _______________________________________________ Bioc-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/bioc-devel
-- Hervé Pagès Program in Computational Biology Division of Public Health Sciences Fred Hutchinson Cancer Research Center 1100 Fairview Ave. N, M1-B514 P.O. Box 19024 Seattle, WA 98109-1024 E-mail: hpa...@fredhutch.org Phone: (206) 667-5791 Fax: (206) 667-1319 _______________________________________________ Bioc-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/bioc-devel
