Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/5909#discussion_r35830437
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
---
@@ -498,6 +498,51 @@ class RowMatrix(
}
/**
+ * Compute QR decomposition for [[RowMatrix]]. The implementation is
designed to optimize the QR
+ * decomposition (factorization) for the [[RowMatrix]] of a tall and
skinny shape.
+ * Reference:
+ * Paul G. Constantine, David F. Gleich. "Tall and skinny QR
factorizations in MapReduce
+ * architectures" ([[http://dx.doi.org/10.1145/1996092.1996103]])
+ *
+ * @param computeQ: whether to computeQ
--- End diff --
remove `:`
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