cut() on NA gives 0 when labels=F

[David Brahm]

Hi all,

I just noticed this odd behavior in R 1.5.1 (on Solaris 2.6):

  R> cut(c(2,NA), 1:5, labels=F)
     [1] 1 0

Is it a bug?  I would have expected "1 NA" (better for indexing), and also the
S-Plus analog is:

  S-Plus> as.integer(cut(c(2,NA), 1:5))
     [1]  1 NA

Apologies ahead of time if it's already fixed in R 1.6.0 and/or already known
(perhaps related to PR#1694?).  If others agree it's a bug I'll submit it.
-- 
                              -- David Brahm (brahm@alum.mit.edu)
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