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https://issues.apache.org/jira/browse/MAHOUT-340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12849689#action_12849689
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Hui Wen Han commented on MAHOUT-340:
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Thanks your advice, I get your mean, you are right.
I　replaced all related int to long,
I will compare the result using item and using the reformed one.
> org.apache.mahout.cf.taste.hadoop.cooccurence can not support long as user_id
> and item_id
> -----------------------------------------------------------------------------------------
>
> Key: MAHOUT-340
> URL: https://issues.apache.org/jira/browse/MAHOUT-340
> Project: Mahout
> Issue Type: Improvement
> Components: Collaborative Filtering
> Affects Versions: 0.3
> Reporter: Hui Wen Han
> Fix For: 0.4
>
>
> I have preferences data using long as user_id and item_id,
> hadoop cooccurence arithmetic can not support it
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