[R] efficient test for missing values (NAs)

[Phil Spector]

Ali -
   If all you care about is if there are any missing values
(not how many or where they are), I think it would be a bit
faster to use

   if(any(is.na(x))){...}

 					- Phil Spector
 					 Statistical Computing Facility
 					 Department of Statistics
 					 UC Berkeley
 					 spector at stat.berkeley.edu



On Wed, 20 Oct 2010, Ali Tofigh wrote:

> What is the best way to detect whether or not a (potentially large)
> matrix contains missing values (NAs) or not? I use
>
> if (sum(is.na(x)) > 0) {...}
>
> are there more efficient ways?
>
> /Ali
>
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