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  1. Spark
  2. SPARK-8936

Hyperparameter estimation in LDA

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    Details

    • Type: New Feature
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.5.0
    • Component/s: ML
    • Labels:
      None
    • Target Version/s:

      Description

      LDA currently supports inference of word distributions per topic (LDAModel.topicsMatrix) but no hyperparameter (e.g. document-topic Dirichlet parameter alpha, document-word Dirichlet parameter beta) point estimates are produced.

      Hyperparameter estimation in Online LDA has been described by Blei (https://www.cs.princeton.edu/~blei/papers/HoffmanBleiBach2010b.pdf, equation 9) and should be supported in Spark's implementation.

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              • Assignee:
                fliang Feynman Liang
                Reporter:
                fliang Feynman Liang
                Shepherd:
                Joseph K. Bradley
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                • Created:
                  Updated:
                  Resolved: