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Network centralisation

Postby schengko » 17 Jan 2014 18:16

Hi there,

can anybody tell me whether Gephi calculates the centralisation value of a given network (i.e. the degree to which the number of ties per node is distributed over all nodes)? I cannot find it in the stats... If it does, where can I see the value? If not, is there a plugin that calculates it?

Thanks in advance,
Best,
Timo
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Re: Network centralisation

Postby seinecle » 20 Jan 2014 03:20

Hi,

I am not sure I understand what you are looking for. Can you rephrase, or provide a reference with a url?

Thanks,

Clement
http://www.clementlevallois.net
Gephi tutorials and personalized trainings: http://www.clementlevallois.net/training.html
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Re: Network centralisation

Postby schengko » 28 Jan 2014 19:36

Sure. "The centralization of any network is a measure of how central its most central node is in relation to how central all the other nodes are." http://en.wikipedia.org/wiki/Centrality#Centralization

Or here, at the end of the sub-section: http://faculty.ucr.edu/~hanneman/nettex ... ml#Freeman

For instance, a high degree centralisation value thus indicates that a small number of nodes hold a large number of all ties in the network (thus have an extraordinarily high degree centrality, while the majority has a small degree centrality). A small score indicates that all ties are relatively equally distributed over all nodes. A star network has a graph centralisation value of 1, a circle network of 0.

Best,
Timo
schengko
 
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Joined: 17 Jan 2014 18:11

Re: Network centralisation

Postby seinecle » 04 Feb 2014 18:31

Hi,
Yes sure you'll find that in the "Degree" section of the stats panel. Try also other stats ("Diameter", etc) and check their results in the data laboratory: new columns should be created for nodes, detailing for each node the value for the metrics you just ran.

Best,

Clement
http://www.clementlevallois.net
Gephi tutorials and personalized trainings: http://www.clementlevallois.net/training.html
Join the Gephi Facebook group for help and support: https://www.facebook.com/groups/gephi/
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seinecle
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Location: Lyon, France


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