Mike Dusenberry created SYSTEMML-1434:
-----------------------------------------
Summary: Broadcasting Error
Key: SYSTEMML-1434
URL: https://issues.apache.org/jira/browse/SYSTEMML-1434
Project: SystemML
Issue Type: Bug
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,
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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