[R] Count Unique Rows/Values

[Liaw, Andy]

This might help:

> x <- read.table("clipboard", colClasses=c("numeric", "character"))
> (x.unique <- lapply(x, unique))
$V1
[1] 155 138 126 123 103 143 111 156

$V2
[1] "A" "B" "C" "D"

> sapply(x.unique, length)
V1 V2 
 8  4 

Andy

From: Sachin J
> 
> Hi,
>    
>   I have a dataset which has both numeric and character 
> values with dupllicates. For example:
>    
>   155   A
> 138   A
> 138   B
> 126   C
> 126   D
> 123   A
> 103   A
> 103   B
> 143   D
> 111   C
> 111   D
> 156   C
>    
>   How can I count the number of unqiue entries without 
> counting duplicate entries. Also can I extract the list in a 
> object. What I mean is
>    Col1 unique count = 8  Unique Elements are : 
> 103,111,123,126,138,143,155,156
>    Col2 unique count = 4  Unique Elements are :  A,B,C,D.
>    
>   Any pointers would be of great help.
>    
>   TIA
>   Sachin
>    
> 
> 		
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