Sorting on multiple columns within a matrix

*To*: mathgroup at smc.vnet.net*Subject*: [mg57819] Sorting on multiple columns within a matrix*From*: Lee Newman <leenewm at umich.edu>*Date*: Thu, 9 Jun 2005 05:18:06 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hello, I can't come up with a solution to the following simple task: - I have a matrix, let's M={ {"Z",2,"a"},{"A",2,"k"}, {"Z",1,"z"}, {"A",1,"a"},{"Z",3,"k"}, {"A",3,"z"} } - I want to be able to sort the matrix row-wise, based on multiple columns, for example sort first on column 2 (ascending) and then secondly on column1 (ascending) desired result: A 1 a Z 1 z A 2 k Z 2 a A 3 z Z 3 k I suspect the solution involves using a pure function of some form as the second argument in the Sort function, but I can't figure out what this function should be. Thanks, Lee

**Follow-Ups**:**Re: Sorting on multiple columns within a matrix***From:*János <janos.lobb@yale.edu>