Derrick Burns created SPARK-3219:
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             Summary: K-Means clusterer should support Bregman distance metrics
                 Key: SPARK-3219
                 URL: https://issues.apache.org/jira/browse/SPARK-3219
             Project: Spark
          Issue Type: Improvement
          Components: MLlib
            Reporter: Derrick Burns


The K-Means clusterer supports the Euclidean distance metric.  However, it is 
rather straightforward to support Bregman 
(http://machinelearning.wustl.edu/mlpapers/paper_files/BanerjeeMDG05.pdf) 
distance functions which would increase the utility of the clusterer 
tremendously.

I have modified the clusterer to support pluggable distance functions.  
However, I notice that there are hundreds of outstanding pull requests.  If 
someone is willing to work with me to sponsor the work through the process, I 
will create a pull request.  Otherwise, I will just keep my own fork.



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