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From "Mike Dusenberry (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SYSTEMML-1921) Bug in recurrent layers when only returning final output
Date Wed, 20 Sep 2017 20:27:00 GMT
Mike Dusenberry created SYSTEMML-1921:
-----------------------------------------

             Summary: Bug in recurrent layers when only returning final output
                 Key: SYSTEMML-1921
                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1921
             Project: SystemML
          Issue Type: Bug
            Reporter: Mike Dusenberry
            Assignee: Mike Dusenberry


Currently, there is a typo in the {{backward}} functions of the recurrent layers when {{given_sequences}}
is false.  Specifically, when only the final time-step's output was desired from the forward
functions, {{out}} and {{dout}} will be of shape {{(N, M)}}, and within the {{backward}} functions,
{{dout}} will be padded with zeros for the earlier time-steps to enlarge the shape to {{(N,
T*M)}}.  While the goal of the logic and the associated comments were correct, there was a
typo in which the shape was instead enlarged to {{(T*D)}}.



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