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Posted to issues@spark.apache.org by "Peng Meng (JIRA)" <ji...@apache.org> on 2017/09/25 08:57:01 UTC

[jira] [Created] (SPARK-22114) The condition of OnlineLDAOptimizer convergence should be configurable

Peng Meng created SPARK-22114:
---------------------------------

             Summary: The condition of OnlineLDAOptimizer convergence should be configurable  
                 Key: SPARK-22114
                 URL: https://issues.apache.org/jira/browse/SPARK-22114
             Project: Spark
          Issue Type: Improvement
          Components: ML, MLlib
    Affects Versions: 2.3.0
            Reporter: Peng Meng
            Priority: Minor


The current convergence of OnlineLDAOptimizer is:
{code:java}
while(meanGammaChange > 1e-3)
{code}

The condition of this is critical for the performance and accuracy of LDA. 
We should keep this configurable, like it is in Vowpal Vabbit: 
https://github.com/JohnLangford/vowpal_wabbit/blob/430f69453bc4876a39351fba1f18771bdbdb7122/vowpalwabbit/lda_core.cc :638



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