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Posted to dev@mahout.apache.org by "Adam Ilardi (JIRA)" <ji...@apache.org> on 2014/03/13 15:45:45 UTC

[jira] [Updated] (MAHOUT-1453) ImplicitFeedbackAlternatingLeastSquaresSolver add support for user supplied confidence functions

     [ https://issues.apache.org/jira/browse/MAHOUT-1453?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adam Ilardi updated MAHOUT-1453:
--------------------------------

    Description: 




  was:
I added a test case for the YtY calculation code
I removed the indexes.quickSort() in the YtY calculation  because I don't think it's necessary and the test cases passed without it. The order shouldn't matter since you're adding the scalers together. Correct me if i'm wrong.

In Factorization.java I added methods to access the iterator of item ids and user ids directly. This saves memory when using classes like TopItems.java when you don't have the DataModel class in memory as well. 




> ImplicitFeedbackAlternatingLeastSquaresSolver add support for user supplied confidence functions
> ------------------------------------------------------------------------------------------------
>
>                 Key: MAHOUT-1453
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1453
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Collaborative Filtering
>    Affects Versions: 0.9
>            Reporter: Adam Ilardi
>            Assignee: Sebastian Schelter
>            Priority: Minor
>              Labels: newbie, patch, performance
>             Fix For: 1.0
>
>




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