Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/5858#discussion_r29545209
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/DataFrameStatSuite.scala ---
@@ -43,7 +43,15 @@ class DataFrameStatSuite extends FunSuite {
val singleColResults = df.stat.freqItems(Array("negDoubles"), 0.1)
val items2 = singleColResults.collect().head
items2.getSeq[Double](0) should contain (-1.0)
+ }
+ test("pearson correlation") {
+ val df = sqlCtx.sparkContext.parallelize(
+ Array.tabulate(10)(i => (i, 2 * i, i * -1.0))).toDF("a", "b", "c")
--- End diff --
fyi we have implicits to add toDF on Seq[Tuples], so you can just replace
Array with Seq, and then remove all the sparkContext.parallelize stuff. Maybe
do it for the frequent items above also.
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