[Feature Request] Skip point in custom timeseries

[Bartimaeus-]

There are some cases where it would be nice for a custom time series to selectively "skip" one or more points. This would be especially useful for filtering data.

Presently returning math.NaN, nil, or nothing result in a semaphore error

Example: custom time series that is only the data from the first day of a timeseries

Interestingly, returning "math" does seem to let you skip points (bug or feature?):

You could decide to return 0 when outside the range, but that throws off data statistics like average.

[ssys-zdavis]

Returning an empty table seems to work: return {}