Encode the Terminal Times of Time Series
Usage
start(x, ...)
end(x, ...)
Arguments
x
|
a univariate or multivariate time-series, or a vector or matrix.
|
...
|
extra arguments for future methods.
|
Description
Extract and encode the times the first and last observations were
taken. Provided only for compatibility with S version 2.Details
These are generic functions, which will use the
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
).Warning
The representation used by start
and end
has no
meaning unless the frequency is supplied.See Also
ts
, time
, tsp
.