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https://issues.apache.org/jira/browse/SPARK-11826?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15020979#comment-15020979
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Sean Owen commented on SPARK-11826:
-----------------------------------
OK, given the existence of add(), this probably makes some sense for
completeness. It's minor, so best to keep the implementation light. Can you
implement add() and subtract() in terms of one common function that takes an
associative operation on matrices in Breeze?
> Subtract BlockMatrix
> --------------------
>
> Key: SPARK-11826
> URL: https://issues.apache.org/jira/browse/SPARK-11826
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Affects Versions: 1.6.0
> Reporter: Ehsan Mohyedin Kermani
> Priority: Minor
>
> It'd be more convenient to have subtract method for BlockMatrices.
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