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https://issues.apache.org/jira/browse/SYSTEMML-1434?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Dusenberry updated SYSTEMML-1434:
--------------------------------------
Issue Type: Task (was: Bug)
> Generalize Binary Operations to (vector, matrix) Operands
> ---------------------------------------------------------
>
> Key: SYSTEMML-1434
> URL: https://issues.apache.org/jira/browse/SYSTEMML-1434
> Project: SystemML
> Issue Type: Task
> Reporter: Mike Dusenberry
> Attachments: broadcasting_test.dml
>
>
> Currently, we make use of broadcasting to allow for binary operations between
> matrices and vectors that have a common size in each the row or column
> dimension. However, there is currently a limitation in which the matrix must
> be the first argument to the binary operator in order for the broadcasting to
> take place. Otherwise, in the case of the vector being the first argument,
> an error will be thrown. NumPy does not have this limitation.
> Works correctly --> op(matrix, vector):
> {code}
> a = rand(rows=4, cols=16)
> b = rand(rows=1, cols=16)
> out = a * b
> print(toString(out))
> {code}
> Fails --> op(vector, matrix):
> {code}
> a = rand(rows=4, cols=16)
> b = rand(rows=1, cols=16)
> out = b * a
> print(toString(out))
> {code}
> {code}
> org.apache.sysml.parser.LanguageException: Invalid Parameters : ERROR:
> tests/broadcasting_test.dml -- line 4, column 7 -- Mismatch in dimensions for
> operation (b MULT a)
> at
> org.apache.sysml.parser.Expression.raiseValidateError(Expression.java:549)
> at
> org.apache.sysml.parser.BinaryExpression.checkAndSetDimensions(BinaryExpression.java:188)
> at
> org.apache.sysml.parser.BinaryExpression.validateExpression(BinaryExpression.java:141)
> at
> org.apache.sysml.parser.StatementBlock.validate(StatementBlock.java:592)
> at
> org.apache.sysml.parser.DMLTranslator.validateParseTree(DMLTranslator.java:141)
> at org.apache.sysml.api.DMLScript.execute(DMLScript.java:588)
> at org.apache.sysml.api.DMLScript.executeScript(DMLScript.java:350)
> at org.apache.sysml.api.DMLScript.main(DMLScript.java:211)
> Exception in thread "main" org.apache.sysml.api.DMLException:
> org.apache.sysml.parser.LanguageException: Invalid Parameters : ERROR:
> tests/broadcasting_test.dml -- line 4, column 7 -- Mismatch in dimensions for
> operation (b MULT a)
> at org.apache.sysml.api.DMLScript.executeScript(DMLScript.java:364)
> at org.apache.sysml.api.DMLScript.main(DMLScript.java:211)
> Caused by: org.apache.sysml.parser.LanguageException: Invalid Parameters :
> ERROR: tests/broadcasting_test.dml -- line 4, column 7 -- Mismatch in
> dimensions for operation (b MULT a)
> at
> org.apache.sysml.parser.Expression.raiseValidateError(Expression.java:549)
> at
> org.apache.sysml.parser.BinaryExpression.checkAndSetDimensions(BinaryExpression.java:188)
> at
> org.apache.sysml.parser.BinaryExpression.validateExpression(BinaryExpression.java:141)
> at
> org.apache.sysml.parser.StatementBlock.validate(StatementBlock.java:592)
> at
> org.apache.sysml.parser.DMLTranslator.validateParseTree(DMLTranslator.java:141)
> at org.apache.sysml.api.DMLScript.execute(DMLScript.java:588)
> at org.apache.sysml.api.DMLScript.executeScript(DMLScript.java:350)
> ... 1 more
> {code}
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