Mahout
  1. Mahout
  2. MAHOUT-310

LanczosSolver and DistributedLanczosSolver always assume rectangular input, but should also handle symmetric eigensystems.

    Details

    • Type: Improvement Improvement
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 0.3
    • Fix Version/s: 0.3
    • Component/s: None
    • Labels:
      None

      Description

      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).

      1. MAHOUT-lots.diff
        56 kB
        Jake Mannix
      2. MAHOUT-310.patch
        21 kB
        Jake Mannix

        Activity

        Jake Mannix created issue -
        Jake Mannix made changes -
        Field Original Value New Value
        Attachment MAHOUT-310.patch [ 12436986 ]
        Jake Mannix made changes -
        Attachment MAHOUT-lots.diff [ 12437521 ]
        Jake Mannix made changes -
        Status Open [ 1 ] Resolved [ 5 ]
        Fix Version/s 0.3 [ 12314281 ]
        Resolution Fixed [ 1 ]
        Sean Owen made changes -
        Status Resolved [ 5 ] Closed [ 6 ]

          People

          • Assignee:
            Jake Mannix
            Reporter:
            Jake Mannix
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            Dates

            • Created:
              Updated:
              Resolved:

              Development