Dmitriy Lyubimov created MAHOUT-1729:
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Summary: Straighen out behavior of Matrix.iterator() and
iterateNonEmpty()
Key: MAHOUT-1729
URL: https://issues.apache.org/jira/browse/MAHOUT-1729
Project: Mahout
Issue Type: Bug
Reporter: Dmitriy Lyubimov
Assignee: Dmitriy Lyubimov
Fix For: 0.10.2
SparseMatrix in particular does iterateNonEmpty() instead of iterating over all
rows in default iterator. This creates contract inconsistency leading to
computational errors.
so... this fixes to guarantee that
for (row <- mxA)
visits ALL rows in the mxA (even if they are totally empty).
If it is ok not to process completely 0ed rows, then the following form should
be used:
for (row <- mxA.iterateNonEmpty) ...
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