[R] How to view un-sampled data from a randomly sampled dataset

erinu erinu at jhu.edu
Wed Oct 23 20:13:49 CEST 2013

Hi there-

I have a 150 row dataset (data). I create "y" a randomly sampled (without
replacement) set number of observations (40):


I would like to make a new variable "x" that contains the leftover
non-sampled 110 observations.  I am sure there is a fairly easy way to do

Any help would be greatly appreciated.


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