[jira] [Commented] (MAHOUT-709) FP-Growth Redundant patterns

["jinyongbo (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAHOUT-709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13040140#comment-13040140 ] 

jinyongbo commented on MAHOUT-709:
----------------------------------

it looks like my problem is not the same as Hayduk.
my test data is as follow (mahout version 0.4 , minsupport =2)
1 2 5
2 3
4 5
1 2 3
and the output as follow
1 ([2, 1],2)
2 ([2],3), ([2, 3],2), ([2, 1],2)
3 ([2, 3],2)
5 ([5],2)
Obviously,([1],2),([3],2) is missed



> FP-Growth Redundant patterns
> ----------------------------
>
>                 Key: MAHOUT-709
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-709
>             Project: Mahout
>          Issue Type: Bug
>          Components: Frequent Itemset/Association Rule Mining
>    Affects Versions: 0.4, 0.5
>            Reporter: Yarco Hayduk
>            Assignee: Robin Anil
>              Labels: fp-growth, frequent, parallel, pattern
>             Fix For: 0.6
>
>         Attachments: SixTransactions.dat, bresult-new.txt, dumpedPatterns, patterns-converted.txt
>
>
> The algorithm outputs more patterns that it is needed. 
> I have tested Mahout's PFP-Growth algorithm with the http://www.borgelt.net/fpgrowth.html FP-Growth implementation. This implementation has an option to generate closed patterns too. 
> When I filtered out the sub patterns from the output of Parallel FP-Growth I arrived to the same result, as in http://www.borgelt.net/fpgrowth.html
> Succinctly, you are not outputting closed items
> I am attaching the dummy DB along with the output of both algorithms

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