Duplicate and Unique Data Frame Question

["Overstreet, Jason" <joverstreet@hotwater.com>]

The following example is created for demonstrative purposes for unique and duplicated rows in a data frame.  Given the following command lines:

> x <- c("a", "a", "b", "b", "c", "c", "c","d","e","f")

> y <- c(1,2,3,4,5,6,7,8,9,10)

>

> xy<-data.frame(x,y)

> xy

   x  y

1  a  1

2  a  2

3  b  3

4  b  4

5  c  5

6  c  6

7  c  7

8  d  8

9  e  9

10 f 10

How does one create separate data frames for the duplicated rows ( lines 1 through 7 )  and the unique rows (lines 8 through 10)?  

Jason Overstreet

Statistician

ASQ: CRE, CQE

A.O. Smith

106 Adkisson Street

Ashland, TN 37015

Office: (615) 792-6253

Cell: (615) 495-6144

Fax: (615) 792-2121

Email: joverstreet@hotwater.com

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