Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/19638#discussion_r148460065
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/evaluation/RegressionMetrics.scala
---
@@ -125,4 +125,14 @@ class RegressionMetrics @Since("2.0.0") (
1 - SSerr / SStot
}
}
+
+ /**
+ * Returns adjusted R^2^, the adjusted coefficient of determination.
+ * @see <a
href="https://en.wikipedia.org/wiki/Coefficient_of_determination#Adjusted_R2";>
+ * Coefficient of determination (Wikipedia)</a>
+ */
+ @Since("2.2.0")
--- End diff --
This must be since 2.3.0
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