Re: Find common elements in a list of sublists
- To: mathgroup at smc.vnet.net
- Subject: [mg125822] Re: Find common elements in a list of sublists
- From: Helen Read <readhpr at gmail.com>
- Date: Wed, 4 Apr 2012 04:28:51 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <jleda1$gjk$1@smc.vnet.net>
On 4/3/2012 4:44 AM, Cisco Lane wrote:
> Suppose I have a list of sublists:
>
> d={{1, 19}, {1, 23}, {1, 5, 25}, {1, 17}, {1, 11}, {1, 5}}
>
> How do I find the elements common to all the sublists?
>
> I can do it using intersection:
>
> Intersection[dx[[1]], dx[[2]], dx[[3]], dx[[4]], dx[[5]], dx[[6]]]
>
> which yields, correctly, {1}, but what if the number of sublists in d is variable?
>
MapThread[Intersection, d, 0]
--
Helen Read
University of Vermont