[Rd] Characters subsetted with NA (was: Several R vs S-Plus issues)
Thu, 4 Oct 2001 18:16:18 +0200
>>>>> David Brahm writes:
> Peter Dalgaard <email@example.com> wrote:
>> Basically, we should have a *real* NA for string variables, distinct from
>> the character string "NA" and propagating like any other NA's.
> I could go for that. How would it appear when cat()ed or print()ed?
I think <NA> to distinguish from "NA".
R 1.4.0 already has
o Printing factors with both level "NA" and missing values
uses `<NA>' for the missing values to distinguish them.
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