Re: Occurrences in Mathematica
- To: mathgroup at smc.vnet.net
- Subject: [mg106387] Re: Occurrences in Mathematica
- From: Albert Retey <awnl at gmx-topmail.de>
- Date: Mon, 11 Jan 2010 05:30:46 -0500 (EST)
- References: <hic33o$59f$1@smc.vnet.net>
Hi,
>
> I have a very big list of elements and I need Mathematica to give me
> only those elements which occure only once...
>
> Could anybody advise me please how to write the code for that?
>
If you use version 6 or 7, maybe like this?
list = RandomInteger[1000, 1000];
Cases[Tally[list], {x_, 1} :> x]
hth,
albert