[R] Counting NA?

[Laurent Gautier]

On Wed, Oct 23, 2002 at 02:48:20AM -0400, Matej Cepl wrote:
> Hi,
> 
> how to do quickly equivalent of the following?
> 
> 	counter = 0
> 	for(i in 1:length(data$S2)) {
> 		if(!is.na(data$S2[i])) {
> 			counter = counter + 1
> 		}
> 	}
> 


Try:

sum(is.na(data$2))



Hopin' it helps,


L.
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