[R] Judging if a matrix contains any NA

[peter dalgaard]

> On 27 Jul 2015, at 03:18 , LiuNing <liuning.1982 at qq.com> wrote:
> 
>> all(is.na(a)) [1] FALSE
> 
> 

Bzzt! Try !all(is.finite(a))

-pd

> 
> ------------------ Original ------------------
>  From:  "Steven Yen";<syen04 at gmail.com>;
> Date:  Mon, Jul 27, 2015 09:10 AM
> To:  "r-help mailing list"<r-help at r-project.org>; 
> 
> Subject:  [R] Judging if a matrix contains any NA
> 
> 
> 
> How do I judge if a matrix contain any NA or otherwise non-missing, 
> non-numerical?
> In the following, I would like to deliver ONE logical of TRUE or FALSE, 
> rather than a 4 x 4 matrix containing TRUE or FALSE. Thank you.
> 
>> a<-matrix(1:16,nrow=4)
>> diag(a)<-NA
>> a
>      [,1] [,2] [,3] [,4]
> [1,]   NA    5    9   13
> [2,]    2   NA   10   14
> [3,]    3    7   NA   15
> [4,]    4    8   12   NA
>> is.na(a)
>       [,1]  [,2]  [,3]  [,4]
> [1,]  TRUE FALSE FALSE FALSE
> [2,] FALSE  TRUE FALSE FALSE
> [3,] FALSE FALSE  TRUE FALSE
> [4,] FALSE FALSE FALSE  TRUE
> 
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> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
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> and provide commented, minimal, self-contained, reproducible code.

-- 
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com