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Re: Sort List of Lists

  • To: mathgroup at smc.vnet.net
  • Subject: [mg24819] Re: Sort List of Lists
  • From: Leszek Sczaniecki <lsczan at concentric.net>
  • Date: Sun, 13 Aug 2000 23:49:44 -0400 (EDT)
  • Organization: Concentric Internet Services
  • References: <8n5ipb$n0o@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

lst = {{9, 2}, {1, 6}, {2, 4}};

Sort[lst, #1[[2]] >= #2[[2]] &]

Cheers,

-- Leszek


dana2 wrote:

> Hello.  Could someone please give me a clue on how to sort a list based on
> the Second Element in a List:
> I think one needs to use a "pure function" but I am too new with Mathematica (v4)
> (Trying to learn though) :>)
>
> For Example, I would like to sort this list based on the second element in
> each sub-list in "Descending" order:
>
> {{9, 2}, {1, 6}, {2, 4}}
>
> Results would be:
> { {1,6},{2,4},{9,2} }
>
> I think I will learn a lot about Lists, Sorting, and Pure Functions all in
> one shot  if I could get a hint on how to do this.

>
> Thank you  very much.  Dana



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