```Date: Jan 26, 2013 4:58 PM
Author: Bob Hanlon
Subject: Re: sorting?

lalista = {{0, 5}, {8, 8}, {2, 2}, {3, 5}, {1, 3}, {3, 9}};SortBy[lalista, (Divide @@ #) + 10^-6*#[[2]] &] // Reverse{{8, 8}, {2, 2}, {3, 5}, {3, 9}, {1, 3}, {0, 5}}Bob HanlonOn Sat, Jan 26, 2013 at 1:39 AM, Francisco Gutierrez<fgutiers2002@yahoo.com> wrote:>> Friends:> I have a large list of simple numerical lists, and I want to sort it using two criteria. in the simplest case, suppose the sublists are of length two, and> that my first criterion is the quotient of part one by part two, and my second criterion is the size of part two (no zeros in part 2.  I want to sort> using the first criterion, and then break the ties using the second one.> So for example if I had> lalista={{0,5},{8,8},{2,2},{3,5},{1,3},{3,9}},> the sorting should return>> {{8,8},{2,2},{3,5},{3,9},{1,3},{0,5}}>> Of course this can be done, but I wonder if it is a way to make this only with native Mathematica tools (wich is always far more efficient).>> Thanks for your help>> Francisco>
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