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From "Gayathri Murali (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-13733) Support initial weight distribution in personalized PageRank
Date Tue, 22 Mar 2016 20:26:25 GMT

    [ https://issues.apache.org/jira/browse/SPARK-13733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15207219#comment-15207219
] 

Gayathri Murali commented on SPARK-13733:
-----------------------------------------

[~mengxr] [~dwmclary] https://issues.apache.org/jira/browse/SPARK-5854 - mentions one key
difference between page rank and personalized page rank as:
"In PageRank, every node has an initial score of 1, whereas for Personalized PageRank, only
source node has a score of 1 and others have a score of 0 at the beginning.", which basically
means we initialize as [1, 0, 0, 0, ..] where we set 1 only to the seed node. 

For this JIRA, do we want to instead set an initial distribution of weights such that all
nodes receive non-zero initial values?  Could you clarify if this is the behavior that is
intended?




> Support initial weight distribution in personalized PageRank
> ------------------------------------------------------------
>
>                 Key: SPARK-13733
>                 URL: https://issues.apache.org/jira/browse/SPARK-13733
>             Project: Spark
>          Issue Type: New Feature
>          Components: GraphX
>            Reporter: Xiangrui Meng
>
> It would be nice to support personalized PageRank with an initial weight distribution
besides a single vertex. It should be easy to modify the current implementation to add this
support.



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