[Rd] Re: [R] Several R vs S-Plus issues
Duncan Murdoch
murdoch@stats.uwo.ca
Thu, 04 Oct 2001 13:25:40 -0400
On Thu, 4 Oct 2001 18:14:48 +0200, Kurt Hornik wrote in message
<15292.35576.513722.492732@mithrandir.hornik.net>:
>Agreed. As Peter said, subscripting by NA should give NA but R cannot
>distinguish a string NA from the string NA.
But it does make some sort of distinction, as my example contrasting
"NA" with paste(NA) shows. In case you missed it:
> is.na("NA")
[1] TRUE
> paste(NA)
[1] "NA"
> is.na(paste(NA))
[1] FALSE
Duncan Murdoch
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