Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/1787#discussion_r16327110
--- Diff: core/src/main/scala/org/apache/spark/rdd/DoubleRDDFunctions.scala
---
@@ -96,6 +96,10 @@ class DoubleRDDFunctions(self: RDD[Double]) extends
Logging with Serializable {
*/
def histogram(bucketCount: Int): Pair[Array[Double], Array[Long]] = {
// Compute the minimum and the maxium
+ def customRange(min: Double, max: Double, steps: Int):
IndexedSeq[Double] = {
+ val span = max - min
--- End diff --
We can save some FLOPs by computing the stepSize first:
~~~
val stepSize = (max - min) / steps
Range.Int(0, steps, 1).map(s => min + s * stepSize) :+ max
~~~
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