Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/4109#discussion_r23589785
--- Diff: mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala
---
@@ -114,7 +118,24 @@ class DenseMatrix(val numRows: Int, val numCols: Int,
val values: Array[Double])
require(values.length == numRows * numCols, "The number of values
supplied doesn't match the " +
s"size of the matrix! values.length: ${values.length}, numRows *
numCols: ${numRows * numCols}")
- override def toArray: Array[Double] = values
+ override def toArray: Array[Double] = {
+ if (!isTransposed) {
+ values
+ } else {
+ val transposedValues = new Array[Double](values.length)
--- End diff --
Use `foreachActive` and move this implementation to `Matrix`.
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