Github user zhengruifeng commented on a diff in the pull request:
https://github.com/apache/spark/pull/13078#discussion_r63128009
--- Diff: mllib/src/main/scala/org/apache/spark/ml/ann/BreezeUtil.scala ---
@@ -55,7 +55,7 @@ private[ann] object BreezeUtil {
* @param y y
*/
def dgemv(alpha: Double, a: BDM[Double], x: BDV[Double], beta: Double,
y: BDV[Double]): Unit = {
- require(a.cols == x.length, "A & b Dimension mismatch!")
+ require(a.cols == x.length, "A & x Dimension mismatch!")
--- End diff --
Right. I will rename the matrix args to upper and add this missing checking.
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