Try:

which(is.na(m), arr = T)

On Fri, Oct 31, 2008 at 9:17 AM, Shubha Vishwanath Karanth <
shubhak@ambaresearch.com> wrote:

> Hi R,
>
>
>
> m=data.frame(a=c(1,NA,5,5),b=c(4,5,6,7),c=c(NA,NA,NA,5))
>
>
>
> I want to know the methods of getting row and column positions of NA in
> the above dataframe. How do I do this?
>
>
>
>
>
> Thanks, Shubha
>
>
>
> This e-mail may contain confidential and/or privileged i...{{dropped:13}}
>
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>



-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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