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MathGroup Archive 2006

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Re: Sorting Rows of a Matrix

  • To: mathgroup at smc.vnet.net
  • Subject: [mg65112] Re: [mg65089] Sorting Rows of a Matrix
  • From: Sseziwa Mukasa <mukasa at jeol.com>
  • Date: Wed, 15 Mar 2006 06:28:24 -0500 (EST)
  • References: <200603141100.GAA24159@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

On Mar 14, 2006, at 6:00 AM, Gregory Lypny wrote:

> Hello everyone,
>
> How can I sort the rows of a matrix by using one or more of the
> columns as sort keys just like in a spreadsheet?  For example, if
> matrix M is 12 x 2 with numbers in the first column and unordered
> month numbers in the second, how would I order the rows by month?

Sort[list,#1[[2]]<#2[[2]]&]

Regards,

Ssezi


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