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https://issues.apache.org/jira/browse/SPARK-8529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14609497#comment-14609497
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Joseph K. Bradley commented on SPARK-8529:
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Here's an example of setting the metadata (but for a NominalAttribute):
[https://github.com/apache/spark/blob/3bee0f1466ddd69f26e95297b5e0d2398b6c6268/mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala#L135]
MinMaxScaler should actually use a NumericAttribute, setting its relevant
fields.
> Set metadata for MinMaxScaler
> -----------------------------
>
> Key: SPARK-8529
> URL: https://issues.apache.org/jira/browse/SPARK-8529
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Reporter: yuhao yang
> Priority: Minor
>
> Add this as an reminder for complementing the output metadata for transformer
> MinMaxScaler.
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