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https://issues.apache.org/jira/browse/MAHOUT-628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13009900#comment-13009900
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Hudson commented on MAHOUT-628:
-------------------------------
Integrated in Mahout-Quality #686 (See
[https://hudson.apache.org/hudson/job/Mahout-Quality/686/])
MAHOUT-628 Add an option to prune away users with less than a given number
of preferences to ItemSimilarityJob and RecommenderJob
> Add an option to prune away users with less than a given number of
> preferences to ItemSimilarityJob and RecommenderJob
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: MAHOUT-628
> URL: https://issues.apache.org/jira/browse/MAHOUT-628
> Project: Mahout
> Issue Type: New Feature
> Components: Collaborative Filtering
> Affects Versions: 0.5
> Reporter: Sebastian Schelter
> Assignee: Sebastian Schelter
> Fix For: 0.5
>
> Attachments: MAHOUT-628.patch
>
>
> Some real-world datasets (especially those created from implicit feedback)
> might include users with only a tiny number of preferences (like
> one-time-visitors only viewing a single item) that a users of
> ItemSimilarityJob or RecommenderJob might want to prune away. I added a new
> parameter "minPrefsPerUser" that makes those jobs throw out users with less
> than a given number of preferences. It is per default set to 1 so that the
> input data stays untouched.
> It's just a small patch to make those jobs more usable in real-world
> scenarios.
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