mahout-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Zeno Gantner (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAHOUT-1089) SGD matrix factorization for rating prediction with user and item biases
Date Mon, 29 Oct 2012 20:32:12 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-1089?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13486316#comment-13486316
] 

Zeno Gantner commented on MAHOUT-1089:
--------------------------------------

With learning rate decay 0.99:
0.075 5 0.01 (RMSE: 0.8656)
                
> SGD matrix factorization for rating prediction with user and item biases
> ------------------------------------------------------------------------
>
>                 Key: MAHOUT-1089
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1089
>             Project: Mahout
>          Issue Type: New Feature
>          Components: Collaborative Filtering
>            Reporter: Zeno Gantner
>            Assignee: Sebastian Schelter
>         Attachments: MAHOUT-1089.patch, RatingSGDFactorizer.java
>
>
> A matrix factorization that is trained with standard SGD on all features at the same
time, in contrast to ExpectationMaximizationFactorizer, which learns feature by feature.
> Additionally to the free features it models a rating bias for each user and item.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message