zhengruifeng created SPARK-29565:
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Summary: OneHotEncoder should support single-column input/ouput
Key: SPARK-29565
URL: https://issues.apache.org/jira/browse/SPARK-29565
Project: Spark
Issue Type: New Feature
Components: ML, PySpark
Affects Versions: 3.0.0
Reporter: zhengruifeng
Current feature algs
({color:#5a6e5a}QuantileDiscretizer/Binarizer/Bucketizer/StringIndexer{color})
are designed to support both single-col & multi-col.
And there is already some internal utils (like
{color:#c7a65d}checkSingleVsMultiColumnParams{color}) for this.
For OneHotEncoder, it's reasonable to support single-col.
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