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https://issues.apache.org/jira/browse/MAHOUT-558?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sebastian Schelter updated MAHOUT-558:
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Attachment: MAHOUT-558-2.patch
changed average computation to not favor obscure items
> Extend ItembasedRecommender to offer different "exclusion modes" when
> computing most similar items to a collection of input items
> ---------------------------------------------------------------------------------------------------------------------------------
>
> Key: MAHOUT-558
> URL: https://issues.apache.org/jira/browse/MAHOUT-558
> Project: Mahout
> Issue Type: New Feature
> Components: Collaborative Filtering
> Affects Versions: 0.5
> Reporter: Sebastian Schelter
> Attachments: MAHOUT-558-2.patch, MAHOUT-558.patch
>
>
> GenericItembased Recommender currently excludes all items that are not
> similar at least one of the input items when computing the most similar items
> to a collection of items. We should introduce a way to have the user decide
> whether he/she wants this behavior or he/she wants to have all items included
> that are similar to at least one of the input items, which is more useful in
> practice in my experience.
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