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| author | Feynman Liang <fliang@databricks.com> | 2015-07-31 18:36:22 -0700 |
|---|---|---|
| committer | Joseph K. Bradley <joseph@databricks.com> | 2015-07-31 18:36:22 -0700 |
| commit | f51fd6fbb4d9822502f98b312251e317d757bc3a (patch) | |
| tree | d69b292785aaeaf1537c2937c24653ee32e1c594 /unsafe | |
| parent | 4d5a6e7b60b315968973e2298eeee5eb174ec721 (diff) | |
| download | spark-f51fd6fbb4d9822502f98b312251e317d757bc3a.tar.gz spark-f51fd6fbb4d9822502f98b312251e317d757bc3a.tar.bz2 spark-f51fd6fbb4d9822502f98b312251e317d757bc3a.zip | |
[SPARK-8936] [MLLIB] OnlineLDA document-topic Dirichlet hyperparameter optimization
Adds `alpha` (document-topic Dirichlet parameter) hyperparameter optimization to `OnlineLDAOptimizer` following Huang: Maximum Likelihood Estimation of Dirichlet Distribution Parameters. Also introduces a private `setSampleWithReplacement` to `OnlineLDAOptimizer` for unit testing purposes.
Author: Feynman Liang <fliang@databricks.com>
Closes #7836 from feynmanliang/SPARK-8936-alpha-optimize and squashes the following commits:
4bef484 [Feynman Liang] Documentation improvements
c3c6c1d [Feynman Liang] Fix docs
151e859 [Feynman Liang] Fix style
fa77518 [Feynman Liang] Hyperparameter optimization
Diffstat (limited to 'unsafe')
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