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Dmitriy Lyubimov edited comment on MAHOUT-376 at 10/10/10 1:08 AM:
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ok, i got to BBt normalized for rank deficiences in Q blocks.
What eigensolver should i use in context of Mahout? I know there's something in that Cern
library but it is all deprecateed. There's also a solver in apache commons, but it is not
readily imported into the mahout core.
Thanks.
PS. i tried EigenvalueDecomposition from cern library. I know i am quite likely providing
an ill-conditioned matrix in my unit test but strange thing is that eigen values are not always
in descending order. i thought they were supposed to come out in descending order?
was (Author: dlyubimov2):
ok, i got to BBt normalized for rank deficiences in Q blocks.
What eigensolver should i use in context of Mahout? I know there's something in that Cern
library but it is all deprecateed. There's also a solver in apache commons, but it is not
readily imported into the mahout core.
Thanks.
> Implement Map-reduce version of stochastic SVD
> ----------------------------------------------
>
> Key: MAHOUT-376
> URL: https://issues.apache.org/jira/browse/MAHOUT-376
> Project: Mahout
> Issue Type: Improvement
> Components: Math
> Reporter: Ted Dunning
> Assignee: Ted Dunning
> Fix For: 0.5
>
> Attachments: MAHOUT-376.patch, sd-bib.bib, sd.pdf, sd.tex, Stochastic SVD using
eigensolver trick.pdf
>
>
> See attached pdf for outline of proposed method.
> All comments are welcome.
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