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https://issues.apache.org/jira/browse/MAHOUT-1374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13954757#comment-13954757
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Sebastian Schelter commented on MAHOUT-1374:
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Take your time to make the changes. Looking forward to seeing the next patch.
> Ability to provide input file with userid, itemid pair
> ------------------------------------------------------
>
> Key: MAHOUT-1374
> URL: https://issues.apache.org/jira/browse/MAHOUT-1374
> Project: Mahout
> Issue Type: Improvement
> Components: Collaborative Filtering
> Affects Versions: 0.8
> Reporter: Romit Singhai
> Fix For: 1.0
>
> Attachments: MAHOUT-1374.patch
>
>
> Currently while running the itembased recommender from the command line, user
> can get recommendation for a particular set of users by using the userFile
> option or for particular set of itemId's by using the itemFile option. Using
> these option together seems to provide recommendations for the cross product
> for the two inputs. We need an option say userItemFile where a coma separated
> userid,itemid pair is provide on each line as input and output will be
> userid,itemid,recommendation. This functionality will be very useful for lot
> users.
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