zhengruifeng opened a new pull request #27944: [SPARK-31180][ML] Implement PowerTransform URL: https://github.com/apache/spark/pull/27944 ### What changes were proposed in this pull request? Power transforms are a family of parametric, monotonic transformationsthat are applied to make data more Gaussian-like. This is useful formodeling issues related to heteroscedasticity (non-constant variance),or other situations where normality is desired. ### Why are the changes needed? It is widely used and suitable to be implemented atop spark ### Does this PR introduce any user-facing change? Yes ### How was this patch tested? added testsuites
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