Re: Data Manipulation
- To: mathgroup at smc.vnet.net
- Subject: [mg43314] Re: Data Manipulation
- From: "Carl K. Woll" <carlw at u.washington.edu>
- Date: Sun, 24 Aug 2003 04:55:12 -0400 (EDT)
- Organization: University of Washington
- References: <bi7o00$pcf$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Ch akpovo,
One possibility is a piece of code I wrote many moons ago:
UnsortedUnion[li_] := Block[{i},
i[n_]:=(i[n]=Sequence[];n);
i /@ li]
Wolfram thought that this code snippet was nice and included it (modified
slightly) in their documentation under further examples for Union.
Carl Woll
Physics Dept
U of Washington
"Ch akpovo" <akpovo at cennas.nhmfl.gov> wrote in message
news:bi7o00$pcf$1 at smc.vnet.net...
> Hello to all,
> I have an elementary problem,
> I created a power spectrum of my data and it gives me expect from the
first
> and the element number datalength/2+1, all the others are repeated. What I
> want to do is to use a mathematica command that remove that repetition
> without sorting. The command Union[list] is removing the repeated elements
> but is sorting the new list. Can anyone help me?
>
>
> Ch akpovo
>