| % File src/library/stats/man/start.Rd |
| % Part of the R package, https://www.R-project.org |
| % Copyright 1995-2007 R Core Team |
| % Distributed under GPL 2 or later |
| |
| \name{start} |
| \title{Encode the Terminal Times of Time Series} |
| \usage{ |
| start(x, \dots) |
| end(x, \dots) |
| } |
| \alias{start} |
| \alias{end} |
| \arguments{ |
| \item{x}{a univariate or multivariate time-series, or a vector or matrix.} |
| \item{\dots}{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 |
| \code{\link{tsp}} attribute of \code{x} if it exists. |
| Their default methods decode the start time from the original time |
| units, so that for a monthly series \code{1995.5} is represented |
| as \code{c(1995, 7)}. For a series of frequency \code{f}, time |
| \code{n+i/f} is presented as \code{c(n, i+1)} (even for \code{i = 0} |
| and \code{f = 1}). |
| } |
| \section{Warning}{ |
| The representation used by \code{start} and \code{end} has no |
| meaning unless the frequency is supplied. |
| } |
| \seealso{ |
| \code{\link{ts}}, \code{\link{time}}, \code{\link{tsp}}. |
| } |
| \keyword{ts} |