Github user sethah commented on a diff in the pull request:
https://github.com/apache/spark/pull/13981#discussion_r69350493
--- Diff:
mllib/src/test/scala/org/apache/spark/ml/regression/DecisionTreeRegressorSuite.scala
---
@@ -96,6 +108,22 @@ class DecisionTreeRegressorSuite
assert(variance === expectedVariance,
s"Expected variance $expectedVariance but got $variance.")
}
+
+ val toyDF = TreeTests.setMetadata(toyData, Map.empty[Int, Int], 0)
+ dt.setMaxDepth(1)
+ .setMaxBins(6)
+ .setSeed(0)
+ val calculatedVariances =
dt.fit(toyDF).transform(toyDF).select("variance").collect().map {
--- End diff --
Can we use `.select(dt.getVarianceCol)` instead? Also, the closing brace
should go on the next line, like:
```scala
.map {
case Row(...)
}
```
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