huaxingao commented on issue #26265: [SPARK-29565][ML][PYTHON] OneHotEncoder should support single-column input/output URL: https://github.com/apache/spark/pull/26265#issuecomment-546713366 @srowen Thanks for your comment. I prefer to add the single column support for the consistency and completeness of the APIs. Also, in the use cases of one-hot encoding a single column, it's simpler and more convenient to use an API of one input column.
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