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MathGroup Archive 2007

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Re: Sorting by date

  • To: mathgroup at smc.vnet.net
  • Subject: [mg72654] Re: [mg72637] Sorting by date
  • From: jmt <jmt at dxdydz.net>
  • Date: Sun, 14 Jan 2007 04:02:34 -0500 (EST)
  • Organization: dxdydz
  • References: <200701130917.EAA24117@smc.vnet.net>

On Saturday 13 January 2007 10:17, Clifford Martin wrote:
> Hi All,
> 
> I have a list of lists that looks like so:
> 
> 
> {{3, 137.5, 13978, {2005, 2, 8}}, {3, 138.5, 12519, {2005, 1, 4}}, {3, 
171.9, 15835, {2005, 4, 12}}, {3, 142.8, 17137, {2005, 11, 19}}, 
>   {3, 161.1, 18881, {2006, 1, 18}}, {3, 108.7, 20055, {2006, 2, 28}}, {3, 
157, 21498, {2006, 9, 14}}, {3, 118.1, 10891, {2004, 11, 12}}}
> 
> The last element per vector is a date. I'd like to sort the list so that the 
vectors are arranged in ascending order of date, i.e. the vector containing 
{2004,11,12}  should be first and and the vector containing {2006,9,14}  
should be last. Any help would be appreciated.
> 
> Thanks
> 
> Cliff
> 
> 

You can transform your dates using AbsoluteTime (seconds since jan 1st, 1900) 
and then sort using this field.


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