[jira] [Commented] (SPARK-21131) Fix batch gradient bug in SVDPlusPlus

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-21131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16053032#comment-16053032 ] 

Apache Spark commented on SPARK-21131:
--------------------------------------

User 'lxmly' has created a pull request for this issue:
https://github.com/apache/spark/pull/18337

> Fix batch gradient bug in SVDPlusPlus
> -------------------------------------
>
>                 Key: SPARK-21131
>                 URL: https://issues.apache.org/jira/browse/SPARK-21131
>             Project: Spark
>          Issue Type: Bug
>          Components: GraphX
>    Affects Versions: 2.1.1
>            Reporter: ruiqiangfan
>
> I think the mode of batch gradient in Graphx SVDPlusPlus is incorrect. The changes of this pull request are as blow:
> * Use the mean of batch gradient instead of the sum of batch gradient.
> * When calculating the bias of each rating during iteration,  the bias shouldn't be limit in (minVal, maxVal).
> * The method "calculateIterationRMSE" is added to show the iteration effect clearly.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org