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https://issues.apache.org/jira/browse/MAHOUT-362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sebastian Schelter updated MAHOUT-362:
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    Attachment: MAHOUT-362.patch

> Computation of pairwise cosine similarities for Item-Based Collaborative 
> Filtering
> ----------------------------------------------------------------------------------
>
>                 Key: MAHOUT-362
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-362
>             Project: Mahout
>          Issue Type: New Feature
>          Components: Collaborative Filtering
>            Reporter: Sebastian Schelter
>         Attachments: MAHOUT-362.patch
>
>
> Provides a map/reduce job to precompute the pairwise cosine similarities 
> between the item vectors of the user-item-matrix.  
> The code uses a slightly modified version of the algorithm suggested in 
> "Elsayed et al: Pairwise Document Similarity in Large Collections with 
> MapReduce" 
> (http://www.umiacs.umd.edu/~jimmylin/publications/Elsayed_etal_ACL2008_short.pdf)

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