start(x, …)
end(x, …)
start
and end
has no
meaning unless the frequency is supplied.tsp
attribute of x
if it exists.
Their default methods decode the start time from the original time
units, so that for a monthly series 1995.5
is represented
as c(1995, 7)
. For a series of frequency f
, time
n+i/f
is presented as c(n, i+1)
(even for i = 0
and f = 1
).ts
, time
, tsp
.