Re: sort procedure
- To: mathgroup at smc.vnet.net
- Subject: [mg52515] Re: sort procedure
- From: Bill Rowe <readnewsciv at earthlink.net>
- Date: Tue, 30 Nov 2004 05:24:35 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
On 11/29/04 at 1:22 AM, tarpanelli at libero.it (paolo ) wrote:
>If I have a data serie of n paired observations (x_t,x_t-1) ordered
>according to time, how can i re-order this serie according to the
>size of x_t-1
>The procedure Sort it seems it does not work well. anyone has
>suggestions?
And how did you use Sort? If you correctly specify the ordering function then Sort should work fine. For example:
In[1]:=
data = Table[{Random[], 1/Random[]}, {5}];
Sort[data, OrderedQ[{Last[#1], Last[#2]}] & ]
{{0.0853819963788964, 1.1126376511652434},
{0.12440319976153577, 1.4220646967618538},
{0.8122355791743191, 4.349104929218276},
{0.6792157180842403, 6.721164898417004},
{0.7037212527850069, 11.641624761351718}}
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