tgravescs commented on issue #25983: [SPARK-29327][MLLIB]Support specifying features via multiple columns URL: https://github.com/apache/spark/pull/25983#issuecomment-548426014 Is the lack of response because people are ok with the explanation? There are also lots of algorithms outside the spark core ml lib code that use these classes and so we were thinking this would be convenience method that doesn't add much overhead to the spark core code. It seems like pure overhead to create the VectorAssembler if the algorithm doesn't need it.
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