com.apama.aggregates
Aggregate count(TYPE arg) integer

Parameters:

arg - Nothing, a boolean predicate, or a float or decimal (deprecated).

• With no argument: return the number of items in the window.
• With a boolean argument: count the number of items for which the predicate is true.
• With a float or decimal argument: count the number of items where the argument is not NaN. This mode is deprecated in favor of count(not arg.isNaN()).