Encode the Terminal Times of Time Series
Extract and encode the times the first and last observations were taken. Provided only for compatibility with S version 2.
start(x, …) end(x, …)
- a univariate or multivariate time-series, or a vector or matrix.
- extra arguments for future methods.
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
c(1995, 7). For a series of frequency
n+i/f is presented as
c(n, i+1) (even for
i = 0
f = 1).
The representation used by
end has no
meaning unless the frequency is supplied.