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Posted to dev@mahout.apache.org by "Ted Dunning (JIRA)" <ji...@apache.org> on 2011/08/29 17:38:37 UTC
[jira] [Commented] (MAHOUT-797) MapReduce SSVD: provide alternative
B-pipeline per B=R' ^{-1} Y'A
[ https://issues.apache.org/jira/browse/MAHOUT-797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13092917#comment-13092917 ]
Ted Dunning commented on MAHOUT-797:
------------------------------------
OK. So I need to push out MAHOUT-790 and MAHOUT-792
> MapReduce SSVD: provide alternative B-pipeline per B=R' ^{-1} Y'A
> -----------------------------------------------------------------
>
> Key: MAHOUT-797
> URL: https://issues.apache.org/jira/browse/MAHOUT-797
> Project: Mahout
> Issue Type: Improvement
> Reporter: Dmitriy Lyubimov
> Original Estimate: 48h
> Remaining Estimate: 48h
>
> Since alternative flow using Cholesky decomposition is extremely easy to add to existing computations of BB', I am thinking of just adding an option that chooses between B-pipeline with QR step and B-pipeline with Y'Y-Cholesky step.
> Ongoing work and some initial code (Y'Y step) is here https://github.com/dlyubimov/mahout-commits/tree/MAHOUT-797.
> I also want to fix what's left unfixed in MAHOUT-638.
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