[jira] [Resolved] (SPARK-18456) Use matrix abstraction for LogisitRegression coefficients during training

["Nick Pentreath (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-18456?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Nick Pentreath resolved SPARK-18456.
------------------------------------
       Resolution: Fixed
         Assignee: Seth Hendrickson
    Fix Version/s: 2.1.0

> Use matrix abstraction for LogisitRegression coefficients during training
> -------------------------------------------------------------------------
>
>                 Key: SPARK-18456
>                 URL: https://issues.apache.org/jira/browse/SPARK-18456
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML
>            Reporter: Seth Hendrickson
>            Assignee: Seth Hendrickson
>            Priority: Minor
>             Fix For: 2.1.0
>
>
> This is a follow up from [SPARK-18060|https://issues.apache.org/jira/browse/SPARK-18060]. The current code for logistic regression relies on manually indexing flat arrays of column major coefficients, which can be messy and is hard to maintain. We can use a matrix abstraction instead of a flat array to simplify things. This will make the code easier to read and maintain.



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