srowen commented on issue #25983: [SPARK-29327][MLLIB]Support specifying features via multiple columns URL: https://github.com/apache/spark/pull/25983#issuecomment-545523130 Sure, but xgboost can do that itself without adding an API that isn't (yet) otherwise used by Spark MLlib. I guess I'd wait until there's more than 1 implementation that can take advantage, to make it an API method for everyone. How does this improve xgboost, out of curiosity -- is this in the repo already?
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