Triadic cohesion clustering: Difference between revisions

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'''Note: this page documents a visone functionality that will be in the next release.'''
#REDIRECT [[Simmelian backbone extraction]]
 
More background information is presented at XXXIII Sunbelt Social Networks Conference of the International Network for Social Network Analysis (INSNA),
Hamburg, Germany, May 21-26, 2013:
 
*  Bobo Nick, Conrad Lee, Pádraig Cunningham, Ulrik Brandes: "Triadic Cohesion in Social Networks"
 
Please address questions and comments to [[User:Nick|Bobo Nick]].
 
== Where to find ==
 
Access is given via the [[analysis tab]] in the left-hand side of the visone window:
set ''level'' to '''grouping''', set ''class'' to '''clustering''', and set ''measure'' to '''triadic cohesion clustering (TCC)'''.
 
[[File:Tcc-wheretofind.png]]
 
== How to use ==
 
=== Configuration ===
 
==== link strength ====
 
For each node, the algorithm will rank its neighborhood (outgoing links) according to the provided link strength attribute.
* If '''uniform''' is selected (default), links are first weighted according to their Simmelian strength and afterwards ranked according to this newly created link attribute (termed ''triadType300'').
* '''Otherwise''', the rankings will be calculated according to the link strength attribute that was provided.
 
[[File:Tcc-configure.png]]
 
 
For designated pairs of nodes, the algorithm will calculate the overlap of top-ranked other nodes in their neighborhoods.
Only connected pairs of actors will be compared.
 
==== restricted ====
 
Use this parameter to further restrict for which pairs of actors the overlap of top-ranked neighborhoods is calculated:
 
* if selected (default), the overlap calculation is restricted to those links which have been top-ranked themselves
* if de-selected, the overlap calculation is performed for each pair of connected actors
 
==== max ranking ====
 
You can use the ''max ranking'' parameter to specify the maximal rank which is still reagrded as top-rank.
That is, those neighbors that have been attached a rank greater than ''max ranking'' will be disregarded when calculating the overlap.
(Setting ''max ranking'' to zero will imply zero/undefined overlap values.)
 
==== min overlap ====
 
You can use the ''min overlap'' parameter to specify a minimal required overlap for the corresponding link not to be removed from the network.
Setting ''min overlap'' to zero will imply that only links with undefined overlap value are removed from the network.
 
=== Execution and result ===
 
The resulting neighborhood rankings are saved in a link attribute termed ''rank'', the resulting overlap values are saved in a link attribute termed ''overlap''.
 
 
[[File:Tcc-apply.png]]

Latest revision as of 23:08, 18 April 2013

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