These convenience function is provided for the exclusion
of months. E.g., .range(exclude_from(-6:10, -11:3)) will
yield the monthly values of all parameters for the months
previous June (-6) to current October (10), but without the
months previous November (-11) to current March (3) in
between. While it is also possible to supply arbitrary vectors
as month specification, and not only ranges as shown in most of
the examples here, this way of excluding e.g. the dormant season
is far more convenient.