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https://issues.apache.org/jira/browse/SPARK-20271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15962398#comment-15962398
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Apache Spark commented on SPARK-20271:
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User 'hhbyyh' has created a pull request for this issue:
https://github.com/apache/spark/pull/17583
> Add FuncTransformer to simplify custom transformer creation
> -----------------------------------------------------------
>
> Key: SPARK-20271
> URL: https://issues.apache.org/jira/browse/SPARK-20271
> Project: Spark
> Issue Type: New Feature
> Components: ML
> Affects Versions: 2.2.0
> Reporter: yuhao yang
>
> Just to share some code I implemented to help easily create a custom
> Transformer in one line of code w.
> {code} val labelConverter = new FuncTransformer((i: Double) => if (i >= 1) 1
> else 0) {code}
> This was used in many of my projects and is pretty helpful (Maybe I'm
> lazy..). The transformer can be saved/loaded as other transformer and can be
> integrated into a pipeline normally. It can be used widely in many use cases
> and you can find some examples in the PR.
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