Re: Handling a list: Could you find a more elegant solution?
- To: mathgroup at smc.vnet.net
- Subject: [mg38289] Re: Handling a list: Could you find a more elegant solution?
- From: Erich Mueller <emueller at mps.ohio-state.edu>
- Date: Tue, 10 Dec 2002 04:18:40 -0500 (EST)
- Organization: Ohio State University
- References: <asn36u$40k$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
ListConvolve[{1/2, 1/2}, {a, b, c, d, e}]
or
Plus[##]/2 & @@@ Partition[{a, b, c, d, e}, 2, 1]
On Thu, 5 Dec 2002 guillerm at usal.es wrote:
> I have a list:
>
> list1 = {a, b, c, d, e};
>
> I want manipulate the list to obtain:
>
> (*Out[]:{(a + b)/2, (b + c)/2, (c + d)/2, (d + e)/2}*)
>
> It can be done for this function
>
> f[data_List] := Drop[Plus @@ NestList[RotateRight, data,
> 1], 1]/2
>
> f[list1]
>
> but I am sure that some member of the group can find a more elegant function. I
> will appreciate to know it.
>
> Thanks
>
> Guillermo Sanchez
>
>
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