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MathGroup Archive 2004

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Generating r-combination or r-permutations with replacement.

  • To: mathgroup at smc.vnet.net
  • Subject: [mg51248] Generating r-combination or r-permutations with replacement.
  • From: "phil" <enfo at ucla.edu>
  • Date: Sun, 10 Oct 2004 01:57:19 -0400 (EDT)
  • Organization: University of California, Los Angeles
  • Sender: owner-wri-mathgroup at wolfram.com

Is there an easy function in mathematica that generates a set/list that 
consists of r-combinations or r-permutations with replacement?

e.g. I want the set of all possible sets with 3 elements, with entries from 
{1,2,3,4}, and also the set of all possible unordered sets with 3 elements, 
with entries from {1,2,3,4}.

Any help is appreciated,

-Philip Lu 



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