John Compitello created SPARK-20109:
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Summary: Need a way to convert from IndexedRowMatrix to Block
Key: SPARK-20109
URL: https://issues.apache.org/jira/browse/SPARK-20109
Project: Spark
Issue Type: New Feature
Components: MLlib
Affects Versions: 2.1.0
Reporter: John Compitello
The current implementation of toBlockMatrix on IndexedRowMatrix is
insufficient. It is implemented by first converting the IndexedRowMatrix to a
CoordinateMatrix, then converting that CoordinateMatrix to a BlockMatrix. Not
only is this slower than it needs to be, it also means that the created
BlockMatrix ends up being backed by instances of SparseMatrix, which a user may
not want.
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