sum(..., na.rm=TRUE) oddity
Duncan Murdoch <dmurdoch at pair.com> writes:
Is there ever any reason to name the summands? I'd think it would be
reasonable to generate an error, or at least a warning, in a case
where any of the arguments to be summed are named. For example
sum <- function (..., na.rm = FALSE) {
if (!is.null(names(list(...))))
stop(paste('Named summands:',paste(names(list(...)),collapse='
')))
.Internal(sum(..., na.rm = na.rm))
}
gives this:
sum(1,1,rm.na=TRUE)
Error in sum(1, 1, rm.na = TRUE) : Named summands: rm.na
I think you would quickly run into problems with cod that was using
constructions like do.call("sum",l) or sum(...) if you tried that.
O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907