[R] Function for all 2^N subsets of N

Terry Therneau therneau at mayo.edu
Tue Sep 1 14:38:12 CEST 2009

My first thought was the odometer() function, which is often useful for
tasks like this.  To my surprise it is not a part of the current R.  
  I wonder why?  It shouldn't be an Splus copyright issue as this was a
part of my original S distribution (before Splus even existed), and used
in an example in one of the early books.
  Terry T

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