[jira] [Commented] (SPARK-4588) Add API for feature attributes

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-4588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14349907#comment-14349907 ] 

Apache Spark commented on SPARK-4588:
-------------------------------------

User 'mengxr' has created a pull request for this issue:
https://github.com/apache/spark/pull/4925

> Add API for feature attributes
> ------------------------------
>
>                 Key: SPARK-4588
>                 URL: https://issues.apache.org/jira/browse/SPARK-4588
>             Project: Spark
>          Issue Type: Sub-task
>          Components: ML, MLlib
>            Reporter: Xiangrui Meng
>            Assignee: Sean Owen
>            Priority: Critical
>
> Feature attributes, e.g., continuous/categorical, feature names, feature dimension, number of categories, number of nonzeros (support) could be useful for ML algorithms.
> In SPARK-3569, we added metadata to schema, which can be used to store feature attributes along with the dataset. We need to provide a wrapper over the Metadata class for ML usage.
> The design doc is available at https://docs.google.com/document/d/1796XfSzFbZvGWFs0ky99AJhlqkOBRG1O2bUxK2N4Grk/edit?usp=sharing



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