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https://issues.apache.org/jira/browse/SPARK-34256?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhengruifeng resolved SPARK-34256.
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Fix Version/s: 3.2.0
Resolution: Fixed
Issue resolved by pull request 31354
[https://github.com/apache/spark/pull/31354]
> VectorSlicer refine numFeatures checking and toString method
> ------------------------------------------------------------
>
> Key: SPARK-34256
> URL: https://issues.apache.org/jira/browse/SPARK-34256
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Affects Versions: 3.2.0
> Reporter: zhengruifeng
> Assignee: zhengruifeng
> Priority: Trivial
> Fix For: 3.2.0
>
>
> Current checking of numFeatures needs updates:
> 1, should use inputAttr.size instead of inputAttr.numAttributes to get
> numFeatures;
> 2, this checking is necessary only if $(indices).nonEmpty, otherwise,
> $(indices).max will throw exception java.lang.UnsupportedOperationException:
> empty.max
> 3, in toString, should add length of names;
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