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[SPARK-10491] [MLLIB] move RowMatrix.dspr to BLAS
jira: https://issues.apache.org/jira/browse/SPARK-10491 We implemented dspr with sparse vector support in `RowMatrix`. This method is also used in WeightedLeastSquares and other places. It would be useful to move it to `linalg.BLAS`. Let me know if new UT needed. Author: Yuhao Yang <hhbyyh@gmail.com> Closes #8663 from hhbyyh/movedspr.
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- mllib/src/main/scala/org/apache/spark/ml/optim/WeightedLeastSquares.scala 2 additions, 2 deletions...cala/org/apache/spark/ml/optim/WeightedLeastSquares.scala
- mllib/src/main/scala/org/apache/spark/mllib/linalg/BLAS.scala 44 additions, 0 deletions...b/src/main/scala/org/apache/spark/mllib/linalg/BLAS.scala
- mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/RowMatrix.scala 1 addition, 39 deletions...org/apache/spark/mllib/linalg/distributed/RowMatrix.scala
- mllib/src/test/scala/org/apache/spark/mllib/linalg/BLASSuite.scala 25 additions, 0 deletions.../test/scala/org/apache/spark/mllib/linalg/BLASSuite.scala
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