Re: [R] NULL or NA for missing function arguments?

From: Brahm, David <David.Brahm_at_geodecapital.com>
Date: Mon 16 Oct 2006 - 21:06:44 GMT


Hans-Peter <gchappi@gmail.com> wrote:
> I am troubled by the use of NULL or NA to indicate
> missing/non-specified function arguments.

I suggest using NULL for arguments which are vectors or lists of unspecified length, and NA for "scalars" (arguments whose length should always be one, such as na.rm). I rarely use missing arguments, as they are harder to pass down to other functions.


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