Github user jkbradley commented on a diff in the pull request:
https://github.com/apache/spark/pull/1849#discussion_r16008451
--- Diff: mllib/src/main/scala/org/apache/spark/mllib/linalg/Vectors.scala
---
@@ -128,6 +128,33 @@ object Vectors {
}
/**
+ * Creates a dense vector of all zeros.
+ *
+ * @param size vector size
+ * @return a zero vector
+ */
+ def zeros(size: Int): Vector = {
+ new DenseVector(new Array[Double](size))
+ }
+
+
+ /**
+ * Makes a deep copy of the input vector.
+ */
+ def copy(v: Vector): Vector = {
--- End diff --
Why support copy here, rather than in DenseVector and SparseVector?
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