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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/07/02 21:59:59 UTC
[GitHub] [spark] srowen commented on issue #25032: Add root degree to
PolynomialExpansion
srowen commented on issue #25032: Add root degree to PolynomialExpansion
URL: https://github.com/apache/spark/pull/25032#issuecomment-507860781
I think the main purpose of the polynomial expansion support is to generate interaction terms like "x * y". This only generates fractional powers of an input. I doubt that anything but square root would be useful in almost all cases? so I doubt this is worth adding to the API.
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