[
https://issues.apache.org/jira/browse/MAHOUT-310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jake Mannix resolved MAHOUT-310.
--------------------------------
Resolution: Fixed
Fix Version/s: 0.3
committed
> LanczosSolver and DistributedLanczosSolver always assume rectangular input,
> but should also handle symmetric eigensystems.
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: MAHOUT-310
> URL: https://issues.apache.org/jira/browse/MAHOUT-310
> Project: Mahout
> Issue Type: Improvement
> Affects Versions: 0.3
> Reporter: Jake Mannix
> Assignee: Jake Mannix
> Fix For: 0.3
>
> Attachments: MAHOUT-310.patch, MAHOUT-lots.diff
>
>
> LanczosSolver calls inputMatrix.timesSquared(Vector) as it's Krylov
> iteration, but for symmetric inputMatrix, it should chose to instead call
> inputMatrix.times(Vector).
> Similarly for DistributedLanczosSolver, except in this case,
> DistributedSparseRowMatrix actually needs to properly MapReduce implement
> times(Vector) for this to work (which it should do anyways, instead of throw
> UnsupportedOperationException as it does currently).
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
