Github user rezazadeh commented on the pull request: https://github.com/apache/spark/pull/1778#issuecomment-55542396 @mengxr All requested changes made. All tests are passing locally. However, I expect Jenkins to complain because of the new normL1 and normL2 methods added to MultivariateStatisticalSummary. As we discussed, it is worth adding L1 and L2 norms to MultivariateStatisticalSummary because they are fundamental summaries of all vectors, columns of RowMatrix are no exception.
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