How get value each edge using PageRank?

[spdiana]

Hi,

How to use the pagerank algorithm? And how do I print pagerank values ​​generated for each edge?

[spdiana]

How to use the pagerank algorithm? And how do I print pagerank values ​​generated for each node?

[seinecle]

To do that, go the statistics panel and run the "Page Rank" module (just a click of a button).

This opens a report window that is just informative, you can close it.

Then, you find your page rank values in the data laboratory (Gephi is divided in 3 main views: Overview, Datalaboratory, and Preview. Click on "data laboratory").

If you want to save your network on your disk, just click on File -> Export -> Graph file. The Page Rank values will be saved with your network if you select a network format which allows for attributes, such as graphml or gexf.

Best,

Clement

[pauldmitchell13]

How to use the pagerank algorithm? And how do I print pagerank values ​​generated for each node?

It may look daunting to non-mathematicians, but the PageRank algorithm is in fact elegantly simple and is calculated as follows:

PR(A) = (1-d) + d (PR(T1)/C(T1) + ... + PR(Tn)/C(Tn))
where PR(A) is the PageRank of a page A
PR(T1) is the PageRank of a page T1
C(T1) is the number of outgoing links from the page T1
d is a damping factor in the range 0 < d < 1, usually set to 0.85

The PageRank of a web page is therefore calculated as a sum of the PageRanks of all pages linking to it (its incoming links), divided by the number of links on each of those pages (its outgoing links).

I found this information from http://www.markhorrell.com/seo/pagerank.html . Hope, it will help you to understand.


Regards
Paul D. Mitchell
Web consulting

[faubke]

Let me add a question to this post:
Can I define a starting point (i.e. set Homepage to pagerank 1), or is the first node automatically selected as the home page? The pagerank scores are normalized so that the adjacency matrix sums to 1, can I just transform the scores so that the homepage has score 1?

Cheers
Florian