Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/7361#discussion_r34448082
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/evaluation/RegressionMetrics.scala
---
@@ -53,14 +53,21 @@ class RegressionMetrics(predictionAndObservations:
RDD[(Double, Double)]) extend
)
summary
}
+ private lazy val SSerr = math.pow(summary.normL2(1), 2)
+ private lazy val SStot = summary.variance(0) * (summary.count - 1)
+ private lazy val SSreg = {
+ val yMean = summary.mean(0)
--- End diff --
Isn't this supposed to be the mean of the data (observations) not
predictions?
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