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Re: SortBy

  • To: mathgroup at smc.vnet.net
  • Subject: [mg118205] Re: SortBy
  • From: Heike Gramberg <heike.gramberg at gmail.com>
  • Date: Sat, 16 Apr 2011 07:35:29 -0400 (EDT)

SortBy[KS, #[[2]] &]

Heike

On 15 Apr 2011, at 08:56, graser wrote:

> Dear Mathematica group,
> 
> I have a simple question for you.
> 
> Let's say there is a list like
> 
> KS = {{300, 48, 2}, {500, 23, 5}, {120, 55, 7}, {40, 32, 1}};
> 
> I want to sort it by second element.
> 
> I can use
> 
> Sort[KS, #2[[2]] > #1[[2]] &]
> 
> It gives out like
> 
> {{500, 23, 5}, {40, 32, 1}, {300, 48, 2}, {120, 55, 7}}
> 
> But if I want to use SortBy, how to do that?
> 
> SortBy[KS, ??]
> 
> Thanks!
> 
> 



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