[Rd] [R] unvectorized option for outer()

Thomas Lumley tlumley at u.washington.edu
Tue Nov 1 16:16:20 CET 2005

On Tue, 1 Nov 2005, Duncan Murdoch wrote:

> The version I posted yesterday did indeed mess up when some arguments were 
> unspecified.  Here's a revision that seems to work in all the tests I can 
> think of.  I also added the SIMPLIFY and USE.NAMES args from mapply to it, 
> and a sanity check to the args.
> I did notice and work around one buglet in mapply:  if you choose not to 
> vectorize any arguments, you don't get a call to the original function, 
> mapply returns "list()".
> For example,
>> mapply(function(x) x^2, MoreArgs = list(x=2))
> list()
> whereas I would think 4 is a more logical answer.

I don't agree at all.  The answer should be the length of the longest 
vectorised argument, and it is.


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