[GitHub] spark pull request: [SPARK-11826][MLlib] Refactor add() and subtra...

[jkbradley <gi...@git.apache.org>]

Github user jkbradley commented on the pull request:

    https://github.com/apache/spark/pull/9916#issuecomment-190965496
  
    @ehsanmok Sorry for the delay.  Could you please add a to-do in the code for using zero matrices more efficiently?  Other than that, it looks fine.
    
    Would you be interested in submitting a PR to Breeze to add a primitive for subtracting a DenseMatrix and CSCMatrix?  If you can, please CC me on the PR, and I can help review it.  Thanks!


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