Joseph K. Bradley created SPARK-9788:
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Summary: LDA docConcentration, gammaShape 1.5 binary
incompatibility fixes
Key: SPARK-9788
URL: https://issues.apache.org/jira/browse/SPARK-9788
Project: Spark
Issue Type: Improvement
Components: MLlib
Reporter: Joseph K. Bradley
>From [SPARK-9658]:
1. LDA.docConcentration
It will be nice to keep the old APIs unchanged. Proposal:
* Add “asymmetricDocConcentration” and revert docConcentration changes.
* If the (internal) doc concentration vector is a single value,
“getDocConcentration" returns it. If it is a constant vector,
getDocConcentration returns the first item, and fails otherwise.
2. LDAModel.gammaShape
This should be given a default value.
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