Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/4256#discussion_r23739809
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala
---
@@ -75,6 +77,23 @@ class IndexedRowMatrix(
new RowMatrix(rows.map(_.vector), 0L, nCols)
}
+ /** Converts to BlockMatrix. Creates blocks of size 1024 x 1024. */
+ def toBlockMatrix(): BlockMatrix = {
+ toBlockMatrix(1024, 1024)
+ }
+
+ /**
+ * Converts to BlockMatrix.
+ * @param rowsPerBlock The number of rows of each block. The blocks at
the bottom edge may have
+ * a smaller value. Must be an integer value greater
than 0.
+ * @param colsPerBlock The number of columns of each block. The blocks
at the right edge may have
+ * a smaller value. Must be an integer value greater
than 0.
+ * @return a `BlockMatrix`
+ */
+ def toBlockMatrix(rowsPerBlock: Int, colsPerBlock: Int): BlockMatrix = {
+ toCoordinateMatrix().toBlockMatrix(rowsPerBlock, colsPerBlock)
--- End diff --
Add a TODO here as well. This could be improved.
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