Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/14216#discussion_r71537647
--- Diff:
mllib/src/test/scala/org/apache/spark/mllib/stat/MultivariateOnlineSummarizerSuite.scala
---
@@ -245,4 +245,27 @@ class MultivariateOnlineSummarizerSuite extends
SparkFunSuite {
absTol 1E-8, "normL2 mismatch")
assert(summarizer.normL1 ~== Vectors.dense(0.21, 0.4265, 0.61) absTol
1E-10, "normL1 mismatch")
}
+
+ test("test min/max with weighted samples (SPARK-16561)") {
+ val summarizer1 = (new MultivariateOnlineSummarizer)
+ .add(Vectors.dense(10.0, -10.0), 1e10)
+ .add(Vectors.dense(0.0, 0.0), 1e-10)
+
+ val summarizer2 = new MultivariateOnlineSummarizer
+ summarizer2.add(Vectors.dense(10.0, -10.0), 1e10)
+ for (i <- 1 to 100)
+ summarizer2.add(Vectors.dense(0.0, 0.0), 1e-7)
+
+ val summarizer3 = new MultivariateOnlineSummarizer
+ for (i <- 1 to 100)
+ summarizer3.add(Vectors.dense(0.0, 0.0), 1e-7)
+ summarizer3.add(Vectors.dense(10.0, -10.0), 1e10)
+
+ assert(summarizer1.max ~== Vectors.dense(10.0, 0.0) absTol 1e-14, "max
mismatch")
+ assert(summarizer1.min ~== Vectors.dense(0.0, -10.0) absTol 1e-14,
"max mismatch")
--- End diff --
The text is wrong but I think you could even omit all of them.
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