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2006 Apr 04
2
is.numeric (NA + NA) is TRUE, should be FALSE (PR#8745)
Full_Name: c fillekes
Version: Version 2.2.1 (2005-12-20 r36812)
OS: Gentoo Linux kernel 2.6.12
Submission from: (NULL) (129.116.71.233)
"Not Available" is of course not a numeric:
R
> is.numeric (NA)
[1] FALSE
But for some reason, all arithmetic operations on NA's are
in fact numeric, even if...