Feynman Liang created SPARK-8936:
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Summary: Hyperparameter estimation in LDA
Key: SPARK-8936
URL: https://issues.apache.org/jira/browse/SPARK-8936
Project: Spark
Issue Type: New Feature
Reporter: Feynman Liang
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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