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https://issues.apache.org/jira/browse/MAHOUT-1159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13600292#comment-13600292
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Shannon Quinn commented on MAHOUT-1159:
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Agreed on all points, not sure why I missed that. I've attached the patch and
will commit it unless you have any problems with it.
> Add SSVD option to SpectralKMeans
> ---------------------------------
>
> Key: MAHOUT-1159
> URL: https://issues.apache.org/jira/browse/MAHOUT-1159
> Project: Mahout
> Issue Type: Improvement
> Components: Clustering
> Affects Versions: 0.8
> Reporter: Shannon Quinn
> Assignee: Shannon Quinn
> Priority: Minor
> Fix For: 0.8
>
> Attachments: MAHOUT-1159.patch, MAHOUT-1159-ssvdopts.patch,
> MAHOUT-1159-ssvdpoweriter.patch
>
>
> This adds SSVD as an option for eigensolver, in addition to the [default]
> Lanczos solver. Testing indicated it yielded similar clustering accuracy with
> a possible performance boost.
> This patch includes other small fixes, such as using the default "tempDir"
> for intermediate calculations.
> The initialization of the SSVD solver is a bit awkward, with specifying the
> number of reducers. I hard-coded this at 10; is there a better solution?
> Perhaps making it an optional parameter to the SSVD constructor?
> [Thanks to University of Pittsburgh CS undergraduates Andrew King, Pawan
> Solanki, and Philip Schinis for working on this.]
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