Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/9139#discussion_r42567638
--- Diff: python/pyspark/mllib/linalg/distributed.py ---
@@ -775,6 +775,80 @@ def numCols(self):
"""
return self._java_matrix_wrapper.call("numCols")
+ def add(self, other):
+ """
+ Adds two block matrices together. The matrices must have the
+ same size and matching `rowsPerBlock` and `colsPerBlock` values.
+ If one of the sub matrix blocks that are being added is a
+ SparseMatrix, the resulting sub matrix block will also be a
+ SparseMatrix, even if it is being added to a DenseMatrix. If
+ two dense sub matrix blocks are added, the output block will
+ also be a DenseMatrix.
+
+ :param other: A BlockMatrix
--- End diff --
`param other` and `return` is not necessary here. `A BlockMatrix` doesn't
provide much info.
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