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https://issues.apache.org/jira/browse/MAHOUT-524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13108721#comment-13108721
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Shannon Quinn edited comment on MAHOUT-524 at 9/20/11 1:57 PM:
---------------------------------------------------------------
Sean: #4 is actually an off-by-one error that is the result of specifying
"dimensions 37" when they are indexed in the input file as 1-37, when the
program is expecting 0-36. Changing the input parameter to "dimensions 38" is
kind of a fix, although it will result in the first row and first column of
Mahout's internal representation of the affinity matrix to be all 0s.
Regarding the jobs, I have no idea how they ran previously; I never ran into
that problem when first writing the jobs. Apparently there's a widely-employed
use-case I simply didn't test?
Beyond that, still can't find the source of the error in the attached
EclipseLog; wherever that "/tmp" is being appended at the end, it isn't in any
of the core Mahout code.
was (Author: magsol):
Sean: #4 is actually an off-by-one error that is the result of specifying
"--dimensions 37" when they are indexed in the input file as 1-37, when the
program is expecting 0-36. Changing the input parameter to "--dimensions 38" is
kind of a fix, although it will result in the first row and first column of
Mahout's internal representation of the affinity matrix to be all 0s.
Regarding the jobs, I have no idea how they ran previously; I never ran into
that problem when first writing the jobs. Apparently there's a widely-employed
use-case I simply didn't test?
Beyond that, still can't find the source of the error in the attached
EclipseLog; wherever that "/tmp" is being appended at the end, it isn't in any
of the core Mahout code.
> DisplaySpectralKMeans example fails
> -----------------------------------
>
> Key: MAHOUT-524
> URL: https://issues.apache.org/jira/browse/MAHOUT-524
> Project: Mahout
> Issue Type: Bug
> Components: Clustering
> Affects Versions: 0.4, 0.5
> Reporter: Jeff Eastman
> Assignee: Shannon Quinn
> Labels: clustering, k-means, visualization
> Fix For: 0.6
>
> Attachments: EclipseLog_20110918.txt,
> SpectralKMeans_fail_20110919.txt, aff.txt, raw.txt, spectralkmeans.png
>
>
> I've committed a new display example that attempts to push the standard
> mixture of models data set through spectral k-means. After some tweaking of
> configuration arguments and a bug fix in EigenCleanupJob it runs spectral
> k-means to completion. The display example is expecting 2-d clustered points
> and the example is producing 5-d points. Additional I/O work is needed before
> this will play with the rest of the clustering algorithms.
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