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https://issues.apache.org/jira/browse/MAHOUT-516?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13032374#comment-13032374
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Martin Leginus commented on MAHOUT-516:
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Hi guys,
I am trying to incorporate the Eigencuts clustering into my thesis and I found
one problem within the code (maybe I am wrong :)). It seems for me that in
EigencutsDriver.java on the line 134: "Matrix eigenVectors = new
DenseMatrix(overshoot, eigenrank);" should be replaced with Matrix eigenVectors
= new DenseMatrix(overshoot, dimensions); as the algorithm trims down the
eigenvectors after DistributedLanczosSolver finishes eigenDecomposition. I
believe that this part of the code should be identical with the
SpectralKmeansDriver and therefore mentioned line should be replaced. I have
used Mahout recently and I am just getting familiar with it, therefore its
possible that my observation is wrong. If so I am sorry for spamming you.
Regards
Martin Leginus
> Eigencuts produces unexpected results
> -------------------------------------
>
> Key: MAHOUT-516
> URL: https://issues.apache.org/jira/browse/MAHOUT-516
> Project: Mahout
> Issue Type: Bug
> Components: Clustering
> Affects Versions: 0.4
> Reporter: Jeff Eastman
> Assignee: Jeff Eastman
> Fix For: 0.5
>
> Attachments: MAHOUT-516.patch, jeastman.vcf
>
>
> Shannon reports he suspects a logic error in Eigencuts since it evidently
> does not produce exactly the expected results. It passes all current unit
> tests so we need to characterize the results differences and produce a test
> for it. Marking for 0.5 for now though we will fix it as soon as possible.
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