[jira] [Commented] (SPARK-16494) Upgrade breeze to 0.12

["Sean Owen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-16494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15372543#comment-15372543 ] 

Sean Owen commented on SPARK-16494:
-----------------------------------

Seems OK for 2.1 but the question is always whether it introduces any incompatibilities?

> Upgrade breeze to 0.12
> ----------------------
>
>                 Key: SPARK-16494
>                 URL: https://issues.apache.org/jira/browse/SPARK-16494
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML, MLlib
>            Reporter: Yanbo Liang
>
> breeze 0.12 has been released for more than half a year, and it brings lots of new features, performance improvement and bug fixes.
> One of the biggest features is LBFGS-B which is an implementation of LBFGS with box constraints and much faster for some special case.
> We would like to implement Huber loss function for {{LinearRegression}} (SPARK-3181) and it requires LBFGS-B as the optimization solver. So we should bump up the dependent breeze version to 0.12.
> For more features, improvements and bug fixes of breeze 0.12, you can refer the following link:
> https://groups.google.com/forum/#!topic/scala-breeze/nEeRi_DcY5c



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