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From "Hui Wen Han (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAHOUT-432) Can add one parameter --itemsFile for org.apache.mahout.cf.taste.hadoop.item.RecommenderJob
Date Thu, 01 Jul 2010 15:46:50 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884322#action_12884322
] 

Hui Wen Han commented on MAHOUT-432:
------------------------------------

Hi,Sebastian,
We have think about that ,but for commerce  system ,the invalid data is very much and some
has very high score and very popular. 
even we compute 10 times as much recommended items as we need,it maybe all of them are invalid.


> Can add one parameter --itemsFile for org.apache.mahout.cf.taste.hadoop.item.RecommenderJob

> --------------------------------------------------------------------------------------------
>
>                 Key: MAHOUT-432
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-432
>             Project: Mahout
>          Issue Type: New Feature
>          Components: Collaborative Filtering
>    Affects Versions: 0.4
>            Reporter: Hui Wen Han
>            Assignee: Sean Owen
>            Priority: Minor
>             Fix For: 0.4
>
>
> Can add one parameter --itemsFile for org.apache.mahout.cf.taste.hadoop.item.RecommenderJob
?
> --itemsFile some likes the the --usersFile.
> in some case, we want to calculate similarity using all preferences data ,
> but some item in  preferences  are old ,not available,behind the times or retired ,
> we want that those data can not recommend to users, can only recommend user with new
or valid items.
> so we can add on paramete  --itemsFile for RecommenderJob, itemsFile includes all the
new valid items.

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