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From "Sebastian Schelter (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (GIRAPH-191) Random Walk with Restart
Date Thu, 17 May 2012 22:15:14 GMT

     [ https://issues.apache.org/jira/browse/GIRAPH-191?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sebastian Schelter updated GIRAPH-191:
--------------------------------------

    Attachment: GIRAPH-191.patch

A first draft for the code. It contains an abstract RandomWalkVertex which PageRank, RWR and
others can extend.
                
> Random Walk with Restart
> ------------------------
>
>                 Key: GIRAPH-191
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-191
>             Project: Giraph
>          Issue Type: New Feature
>            Reporter: Gianmarco De Francisci Morales
>         Attachments: GIRAPH-191.patch
>
>
> Implementing RWR on Giraph should be a very simple modification of the SimplePageRankVertex
code.
> {code}
> if ( myID == sourceID )
>       DoubleWritable vertexValue = new DoubleWritable((0.15f + 0.85f * sum);
> else
>       DoubleWritable vertexValue = new DoubleWritable(0.85f * sum);
> {code}
> It would be nice to make it as configurable as possible by using parametric damping factors,
preference vectors, strongly preferential, etc...
> More or less along these lines:
> http://law.dsi.unimi.it/software/docs/it/unimi/dsi/law/rank/PageRank.html

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