[R] <NA> to NA

[Bert Gunter]

> x <- factor(c("whoops","NA",NA,"B"))
> x
[1] whoops NA     <NA>   B
Levels: B NA whoops
> is.na(x)
[1] FALSE FALSE  TRUE FALSE

If this doesn't explain it for you, then read about missing values and
factors in "An Introduction to R."

-- Bert

Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374

"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
H. Gilbert Welch




On Mon, Mar 31, 2014 at 11:29 AM, eliza botto <eliza_botto at hotmail.com> wrote:
> Dear useRs,
> Sorry for such a ridiculous question but i really need to know that what is the difference between <NA> and NA and how to convert <NA> to NA.
> Thankyou very much in advance
> Eliza
>         [[alternative HTML version deleted]]
>
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