[R] Missing values in function calls

[David Winsemius]

On Aug 17, 2010, at 8:22 AM, <vojta at cbox.cz> wrote:

>
> Hello,
> I would like to ask you how to determine if function value is  
> missing for particular function call. I mean if I define function
>

?is.na


> f
>

David Winsemius, MD
West Hartford, CT