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Posted to issues@systemml.apache.org by "Matthias Boehm (JIRA)" <ji...@apache.org> on 2017/12/02 02:05:00 UTC

[jira] [Created] (SYSTEMML-2035) Sparse maxpooling_backward returns incorrect results

Matthias Boehm created SYSTEMML-2035:
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             Summary: Sparse maxpooling_backward returns incorrect results
                 Key: SYSTEMML-2035
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2035
             Project: SystemML
          Issue Type: Bug
            Reporter: Matthias Boehm


The existing tests for maxpooling_backward always use dense data, which hides underlying correctness issues. These issues are due to invalid handling of empty sparse rows, empty ranges, and partial range entries with negative values. In all these cases, the maximum value is 0, which position determines the index for adding corresponding values.



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