[R] is.numeric()

[Thomas Lumley]

On Mon, 13 Aug 2001, kjetil halvorsen wrote:

> Hola!
>
> Is the following correct behaviour?
>
> > is.numeric(NA)
> [1] FALSE
> > is.numeric(c(NA))
> [1] FALSE
> > is.numeric(c(1,2,3,NA))
> [1] TRUE

Yes. NA is a logical constant unless it is coerced to some other type
(?is.na)

	-thomas

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