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https://issues.apache.org/jira/browse/MAHOUT-1178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13918159#comment-13918159
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Gokhan Capan commented on MAHOUT-1178:
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Let me get the pieces together and submit a patch in a few days.
> GSOC 2013: Improve Lucene support in Mahout
> -------------------------------------------
>
> Key: MAHOUT-1178
> URL: https://issues.apache.org/jira/browse/MAHOUT-1178
> Project: Mahout
> Issue Type: New Feature
> Reporter: Dan Filimon
> Assignee: Gokhan Capan
> Labels: gsoc2013, mentor
> Fix For: 1.0
>
> Attachments: MAHOUT-1178-TEST.patch, MAHOUT-1178.patch
>
>
> [via Ted Dunning]
> It should be possible to view a Lucene index as a matrix. This would
> require that we standardize on a way to convert documents to rows. There
> are many choices, the discussion of which should be deferred to the actual
> work on the project, but there are a few obvious constraints:
> a) it should be possible to get the same result as dumping the term vectors
> for each document each to a line and converting that result using standard
> Mahout methods.
> b) numeric fields ought to work somehow.
> c) if there are multiple text fields that ought to work sensibly as well.
> Two options include dumping multiple matrices or to convert the fields
> into a single row of a single matrix.
> d) it should be possible to refer back from a row of the matrix to find the
> correct document. THis might be because we remember the Lucene doc number
> or because a field is named as holding a unique id.
> e) named vectors and matrices should be used if plausible.
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