Github user rmetzger commented on a diff in the pull request:
https://github.com/apache/flink/pull/684#discussion_r32888221
--- Diff:
flink-staging/flink-streaming/flink-streaming-scala/src/main/scala/org/apache/flink/streaming/api/scala/WindowedDataStream.scala
---
@@ -339,4 +335,30 @@ class WindowedDataStream[T](javaStream:
JavaWStream[T]) {
javaStream.getDiscretizedStream.getExecutionEnvironment).scalaClean(f)
}
+ /**
+ * Gives the median of the current window at the specified field at
every trigger.
+ * The type of the field can only be Double (as the median of integers
might be a
+ * fractional number).
+ *
+ * The median is updated online as the window changes, and the runtime of
+ * one update is logarithmic with the current window size.
+ *
+ */
+ def median(pos: Int): WindowedDataStream[T] = {
--- End diff --
Can you also update the streaming programming guide with this new method?
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