Hello,
I think you should Expression actor. There is "sum" function for
arrays in Ptolemy II expression language:
$PTII$/doc/expressionsa12.html
sum {type} or [type]->type
Sum the elements of the specified array or matrix. This throws an
exception if the elements do not support addition or if the array is
empty (an empty matrix will return zero).
IMHO, It is more convinient to implement workflow like yours using Expression.
Alexander Petrov
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