Github user MLnick commented on a diff in the pull request:
https://github.com/apache/spark/pull/9441#discussion_r60598056
--- Diff: python/pyspark/mllib/linalg/distributed.py ---
@@ -789,6 +969,30 @@ def numCols(self):
"""
return self._java_matrix_wrapper.call("numCols")
+ def cache(self):
+ """
+ Caches the underlying RDD.
+ """
+ self._java_matrix_wrapper.call("cache")
+ return self
+
+ def persist(self, storageLevel):
+ """
+ Persists the underlying RDD with the specified storage level.
+ """
+ if not isinstance(storageLevel, StorageLevel):
+ raise TypeError("`storageLevel` should be a StorageLevel, got
%s" % type(storageLevel))
+ javaStorageLevel =
self._java_matrix_wrapper._sc._getJavaStorageLevel(storageLevel)
+ self._java_matrix_wrapper.call("persist", javaStorageLevel)
+ return self
+
+ def validate(self):
+ """
+ Validates the block matrix info against the matrix data (`blocks`)
+ and throws an exception if any error is found.
+ """
+ self._java_matrix_wrapper.call("validate")
+
--- End diff --
`subtract` now exists on the Scale side, it can be added here.
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