[R] how to remove the empty element in the vector

[Roger D. Peng]

How about

x[-c(2, 3)]

-roger

Yanqin Yang wrote:
> Hello,
>    
>   Would anyone kindly tell me how to remove the empty element in the vector object?
>   For example, 
>   > x
> [1] "a" ""  ""  "c" "c" "c" "d"
>> unique(x)
> [1] "a" ""  "c" "d"
> How could I get the output like: "a","c","d"? 
>    
>   Thanks,
>    
>   Yanqin
>    
> 
>  		
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-- 
Roger D. Peng  |  http://www.biostat.jhsph.edu/~rpeng/