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https://issues.apache.org/jira/browse/MAHOUT-756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13062819#comment-13062819
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Lance Norskog commented on MAHOUT-756:
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Perhaps like() and like(row, columns) should just make an empty VectorList?
After all, like() is not clone(). (Which VectorList does not implement and
should.)
> VectorList (Matrix implementation) does maintain cardinality getters correctly
> ------------------------------------------------------------------------------
>
> Key: MAHOUT-756
> URL: https://issues.apache.org/jira/browse/MAHOUT-756
> Project: Mahout
> Issue Type: Bug
> Components: Math
> Reporter: Lance Norskog
> Priority: Minor
> Attachments: VectorList.patch
>
>
> VectorList (implements Matrix) is dynamically expandable, row-wise. There are
> three different ways to query the size of a Matrix, and VectorList does not
> correctly supply these values.
>
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