To apply an
op.mul.ignore-nulls operation, N parameters are on top of the stack: N-1 Geo Time Series™ lists and one labels List. According to those labels, it produces multiple equivalence classes from the GTS inside those N-1 lists (if they match the same labels as the equivalence class). Then
op.mul.ignore-nulls is applyied to the GTS in those classes, building only one result GTS for each class.
op.mul.ignore-nulls operation will multiply at each tick all the values of all the GTS belonging to the same class (if they do have a value for this current tick). To produce a result, all GTS of a same class must have a value at a same tick.
The type of the resulting GTS will be determined by the first non null value.
The name of the resulting GTS is the one of the last GTS of the equivalence class. The labels kept are the one of the equivalence class.
Some types cannot be multiplied (eg it’s not possible to multiply a STRING to a LONG).
This operator simply ignores null values.