Hi,

May be try this :

data[which(is.na(data[,2])),]

2011/1/25 typhoong <graham.li@eurus-energy.com>

>
> hi i have the following dataframe
>
> x       y
> 1       345
> 6       NA
> 8       123
> 32      123
> 12      NA
> 6       124
> 7       NA
>
> and i want to extract the data rows which contains "NA" data, I tried
>
> subset(dataframe,y=="NA")
>
> but fail. if you know the answers, please let me know thanks.
>
> typhoong
>
>
>
>
>
>
> --
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>
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-- 
Kamel Gaanoun
(+33) (0)6.76.04.65.77

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