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MathGroup Archive 1997

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Re: Sorting tables by columns

  • To: mathgroup at smc.vnet.net
  • Subject: [mg6403] Re: [mg6385] Sorting tables by columns
  • From: BobHanlon at aol.com
  • Date: Sun, 16 Mar 1997 19:25:17 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

A = {{2,3,4,5},{1,2,7,8},{6,9,2,1}};

To sort on column n:

n = 1; Sort[A, #1[[n]] < #2[[n]]&]

{{1,2,7,8},{2,3,4,5},{6,9,2,1}}

n = 3; Sort[A, #1[[n]] < #2[[n]]&]

{{6,9,2,1},{2,3,4,5},{1,2,7,8}}


Bob Hanlon


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