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https://issues.apache.org/jira/browse/SPARK-17163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15434798#comment-15434798
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Yanbo Liang commented on SPARK-17163:
-------------------------------------

Think more about this problem, I change my mind to support consolidate MLOR and 
LOR into one since I saw there are lots of duplicated code between them. I 
think it's worth to make the breaking change, otherwise, it will require 
efforts to maintain them. Thanks!

> Decide on unified multinomial and binary logistic regression interfaces
> -----------------------------------------------------------------------
>
>                 Key: SPARK-17163
>                 URL: https://issues.apache.org/jira/browse/SPARK-17163
>             Project: Spark
>          Issue Type: Sub-task
>          Components: ML, MLlib
>            Reporter: Seth Hendrickson
>
> Before the 2.1 release, we should finalize the API for logistic regression. 
> After SPARK-7159, we have both LogisticRegression and 
> MultinomialLogisticRegression models. This may be confusing to users and, is 
> a bit superfluous since MLOR can do basically all of what BLOR does. We 
> should decide if it needs to be changed and implement those changes before 2.1



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