Github user srowen commented on the pull request:
https://github.com/apache/spark/pull/5055#issuecomment-82358358
No, it's almost certainly a result of your change. The prediction of the
SVM changes if you force it to scale features. This is why I'm not sure this is
the right thing to do; it swaps one hard-coded behavior for the other, and
changes behavior. I'd prefer to simply make this selectable for all models.
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