Re: Finding Clusters
- To: mathgroup at smc.vnet.net
- Subject: [mg104564] Re: [mg104515] Finding Clusters
- From: Fred Simons <f.h.simons at tue.nl>
- Date: Wed, 4 Nov 2009 01:33:25 -0500 (EST)
- References: <200911030751.CAA01018@smc.vnet.net>
Here is a very short, very fast but not very simple solution:
components[lst_List] := Module[{f},
Do[Set @@ f /@ pair, {pair, lst}]; GatherBy[Union @@ lst, f]]
Fred Simons
Eindhoven University of Technology
> All.
>
> I have a list which represents some natural event. These events are
> listed pair-wise, which corresponds to event happening within certain
> time interval from each other, as below
>
> event={{1,2},{1,3},{3,4},{5,6},{7,8},{8,10}}
>
> I wish to find a thread of events, i.e. if event A is related to B and
> B to C, I wish to group {A,B,C} together. For the example above I
> would have
>
> {{1,2,3,4},{5,6},{7,8,10}}
>
> This would correspond to do a Graph Plot and identifying the parts
> which are disconnected It should be simple but I'm really finding it
> troublesome.
>
>
>
- References:
- Finding Clusters
- From: fd <fdimer@gmail.com>
- Finding Clusters