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A relevant paper: http://www.pnas.org/content/106/16/6483.abstract

I have some Python/NetworkX code implementing this algorithm if you're
interested.
On Aug 14, 2012 6:37 AM, "Thomas Plotkowiak" <[log in to unmask]> wrote:

> *****  To join INSNA, visit http://www.insna.org  *****
>
> Dear Members,
>
> Are there any guidelines on how to "trim down" networks when one has
> weighted edges? I use to throw out edges below a certain threshold
> (e.g. users exchanging less than 1 tweet a month or so). The resulting
> network gives much better network measures (e.g. betweeness) removing
> all these  "clutter" edges from it. Has this procedure been used in
> some recent SNA papers ? The only similar filtering application I
> found in Tsvetovat's book on social network analysis where he calls
> this procedure the "island method". (p 62)
>
> Best Regards
> Thomas Plotkowiak
>
> Research Assistant
> MCM Institute St. Gallen
>
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