Set Haver Analytics aggregation mode
X = aggregation (C)
X = aggregation (C,V)
X = aggregation (C) returns the current aggregation mode.
X = aggregation (C,V) sets the current aggregation mode to
V. The following table lists possible values for
aggregation does not fill in values for missing data.
aggregation fills in missing data based on data
available in the requested period.
aggregation fills in missing data based on some past
V to its last
Introduced in R2008b