start                  package:base                  R Documentation

Encode the Terminal Times of Time Series

Description:

     Extract and encode the times the first and last observations were
     taken. Provided only for compatibility with S version 2.

Usage:

     start(x, ...)
     end(x, ...)

Arguments:

       x: a univariate or multivariate time-series, or a vector or
          matrix.

     ...: extra arguments for future methods.

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'.

