Github user tgaloppo commented on the pull request:
https://github.com/apache/spark/pull/3022#issuecomment-67387864
I have replaced the accumulators with RDD.aggregate functionality.
I added functionality allowing the user to provide their own initial GMM,
bypassing the random generation of an initial starting point
I added a second unit test with two univariate clusters.
cc: @jkbradley
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