Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/245#discussion_r11149337
--- Diff: mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
---
@@ -54,6 +54,12 @@ trait Vector extends Serializable {
* Converts the instance to a breeze vector.
*/
private[mllib] def toBreeze: BV[Double]
+
+ /**
+ * Gets the value of the ith element.
+ * @param i index
+ */
+ private[mllib] def apply(i: Int): Double = toBreeze(i)
--- End diff --
This is only used in tests and marked `private[mllib]`. For SparseVector,
binary search is used to get the value, which is actually fine if the operation
does not apply to every index.
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