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From "Robin Anil (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (MAHOUT-617) FPGrowth/PFPGrowth giving out wrong results.
Date Mon, 07 Mar 2011 06:43:59 GMT

     [ https://issues.apache.org/jira/browse/MAHOUT-617?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robin Anil reassigned MAHOUT-617:
---------------------------------

    Assignee: Robin Anil

> FPGrowth/PFPGrowth giving out wrong results. 
> ---------------------------------------------
>
>                 Key: MAHOUT-617
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-617
>             Project: Mahout
>          Issue Type: Bug
>          Components: Frequent Itemset/Association Rule Mining
>    Affects Versions: 0.4
>         Environment: Mac OS X, Linux
>            Reporter: Vipul Pandey
>            Assignee: Robin Anil
>              Labels: AssociationMining, FPGrowth, FrequentItemsets
>
> PFPGrowth with my data is giving out wrong results. Attached are : 
> - The input data
> - The output (sequence file) generated by FPGrowth (PFPGrowth gives the same results)
> - Output as text
> $ cat part-r-00000 | grep 1678807047
> 12      1678807047
> 38      1678807047 3159925415
> which says that the support (12) for the item (1678807047) is lesser than the support
(38) of a pair containing that item. 
> another example
> $ cat part-r-00000  | grep 1441690161
> 12              1441690161 3910019844
> 18              1604285941 1441690161 3910019844
> 75              1441690161
> Runtime parameters : 
> -i baskets/part-r-00000 -o patterns -k 50 -method sequential -g 10 -regex '[\t]' -s 10

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