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https://issues.apache.org/jira/browse/SPARK-8515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14634019#comment-14634019
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Feynman Liang commented on SPARK-8515:
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[Design
doc|https://docs.google.com/document/d/1tdweh4oNzdwMhb3HpstEgob2KmmrbRPv7FZHGMzzMg0/edit#heading=h.5uuxnurqgkxr]
> Improve ML attribute API
> ------------------------
>
> Key: SPARK-8515
> URL: https://issues.apache.org/jira/browse/SPARK-8515
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Affects Versions: 1.4.0
> Reporter: Xiangrui Meng
> Labels: advanced
>
> In 1.4.0, we introduced ML attribute API to embed feature/label attribute
> info inside DataFrame's schema. However, the API is not very friendly to use.
> In 1.5, we should re-visit this API and see how we can improve it.
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