it's slightly annoying to write
foo <- 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])
}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
