Splits the data into subsets, computes summary statistics for each, and returns the result in a convenient form.
a scalar function to compute the summary statistics which can be applied to all data subsets.
further arguments passed to
This is a method for the generic
aggregate function was really designed for
tis objects which may or may not meet the
assumptions embedded in the function. The
convert function is
better suited for
as.ts on it's
then passes that and all other arguments on to
then turns the result back into a
tis series. If there is a
local version of
aggregate.ts that can be found by
exists("aggregate.ts", envir = globalenv()),
it will be used in preference to the function in
tis object returned by
as.tis() called on the
ts object returned by
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