[R] efficient test for missing values (NAs)

[Ali Tofigh]

A small test indicates that the following may be the fastest method
(although all are pretty fast)

has.na <- !all(complete.cases(x))

Thanks Jim and Phil for your suggestions.
/Ali

On Wed, Oct 20, 2010 at 19:03, Jim Holtman <jholtman at gmail.com> wrote:
> ?complete.cases
>
> Sent from my iPhone
>
> On Oct 20, 2010, at 18:53, Ali Tofigh <alix.tofigh at gmail.com> 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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