[R] Odp: Extract NA data rows

[Petr PIKAL]

Hi

r-help-bounces at r-project.org napsal dne 25.01.2011 08:07:10:

> 
> 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") 

See

?is.na

however ?complete.cases is my preferred choice when working with data 
frames and several columns.

dataframe[complete.cases(dataframe),]

Regards
Petr

> 
> but fail. if you know the answers, please let me know thanks.
> 
> typhoong
> 
> 
> 
> 
> 
> 
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