start(x, format = F, base = <<see below>>, tol = .Options$ts.eps) end(x, format = F, base = <<see below>>, tol = .Options$ts.eps)
TRUE the result is given in (base, offset) format for
regular time series with integer frequency.
Default is
FALSE.
format is
TRUE, gives the base value for the
starting time of the series from which the (base, offset) value of
start or
end is to be computed
Default is
floor(start.time), where
start.time is the starting time of the
series.
base plus an integer
fraction of the frequency.
Default is
.Options$ts.eps
start returns the time at which the first observation in
x is sampled,
while
end returns the time at which the last observation in
x is sampled.
These are generic functions with methods for each time series class.
For old-style time series, such as those created by
ts, the assumption
is that if the frequency of the time
series is an integer, then all time values including
start and
end can be
represented as an integer plus some fraction that is equal to an integer
divided by the frequency. Time series created by
ts have been
superseded by the classed time series created by
rts,
cts, and
its.
You can coerce an old-style time series to a new with
as.rts.
x <- rts(rnorm(100), start = c(1953, 4), frequency = 12) start(x) end(x)