R help - Aug 2010 - Missing values in function calls

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

f

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

?missing


-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of vojta at cbox.cz
> Sent: Tuesday, August 17, 2010 6:22 AM
> To: r-help at r-project.org
> Subject: [R] Missing values in function calls
> 
> 
> 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
> 
> f
> 
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