Re: Extract values and multilpicities from list
- To: mathgroup at smc.vnet.net
- Subject: [mg64890] Re: Extract values and multilpicities from list
- From: dh <dh at metrohm.ch>
- Date: Tue, 7 Mar 2006 06:11:41 -0500 (EST)
- References: <due96k$ach$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi Wolfgang,.
the following will do it:
{#[[1]], Length[#]} & /@ Split @ Sort @ lstIn
Daniel
Dr. Wolfgang Hintze wrote:
> Given a list of integers which may repeat, e.g.
>
> lstIn = {2,3,4,4,2,1,1,5,4}
>
> provide a list of different values and their respective multiplicities,
> in the example,
>
> LstOut= {{1,2},{2,2},{3,1},{4,3},{5,1}}
>
> Who finds the shortest function doing this task in general?
>
> Thanks.
>
> Best regards,
> Wolfgang
>