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Posted to dev@mahout.apache.org by "Suneel Marthi (JIRA)" <ji...@apache.org> on 2013/07/25 14:43:50 UTC
[jira] [Updated] (MAHOUT-1089) SGD matrix factorization for rating
prediction with user and item biases
[ https://issues.apache.org/jira/browse/MAHOUT-1089?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Suneel Marthi updated MAHOUT-1089:
----------------------------------
Affects Version/s: 0.7
Fix Version/s: 0.8
> 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
> Affects Versions: 0.7
> Reporter: Zeno Gantner
> Assignee: Sebastian Schelter
> Fix For: 0.8
>
> Attachments: MAHOUT-1089.patch, RatingSGDFactorizer.java, 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.
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