[Rd] Generate NA of specified type

[Roger Peng]

What about NAof <- function(x) as(NA, class(x))?

-roger

On Wed, May 5, 2010 at 11:57 AM, Hadley Wickham <hadley at rice.edu> wrote:
> Hi all,
>
> Is there an existing function that provides the correct type of
> missing value for a given vector? e.g.
>
> NAof(1:3) # NA_integer_
> NAof(pi) # NA_real_
> NAof("a") # NA_character_
> NAof(T) # NA
>
> ?
>
> Thanks,
>
> Hadley
>
> --
> Assistant Professor / Dobelman Family Junior Chair
> Department of Statistics / Rice University
> http://had.co.nz/
>
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-- 
Roger D. Peng  |  http://www.biostat.jhsph.edu/~rpeng/