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MathGroup Archive 1999

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RE: Binary System Problem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg18654] RE: [mg18621] Binary System Problem
  • From: "Ersek, Ted R" <ErsekTR at navair.navy.mil>
  • Date: Thu, 15 Jul 1999 01:45:45 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

Frieder Schweigert wrote:
--------------------------

does anybody know an algorithm or generating system for
those binary numbers with a fix amount of '1's,
for example (four times '1'):

 1111
10111
11011
11101
11110

------------------
Try this,

BaseForm[FromDigits[#, 2], 2] & /@ Permutations[{1, 1, 1, 0, 0}]

Regards,
Ted Ersek


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