1% File src/library/stats/man/start.Rd 2% Part of the R package, https://www.R-project.org 3% Copyright 1995-2007 R Core Team 4% Distributed under GPL 2 or later 5 6\name{start} 7\title{Encode the Terminal Times of Time Series} 8\usage{ 9start(x, \dots) 10end(x, \dots) 11} 12\alias{start} 13\alias{end} 14\arguments{ 15 \item{x}{a univariate or multivariate time-series, or a vector or matrix.} 16 \item{\dots}{extra arguments for future methods.} 17} 18\description{ 19 Extract and encode the times the first and last observations were 20 taken. Provided only for compatibility with S version 2. 21} 22\details{ 23 These are generic functions, which will use the 24 \code{\link{tsp}} attribute of \code{x} if it exists. 25 Their default methods decode the start time from the original time 26 units, so that for a monthly series \code{1995.5} is represented 27 as \code{c(1995, 7)}. For a series of frequency \code{f}, time 28 \code{n+i/f} is presented as \code{c(n, i+1)} (even for \code{i = 0} 29 and \code{f = 1}). 30} 31\section{Warning}{ 32 The representation used by \code{start} and \code{end} has no 33 meaning unless the frequency is supplied. 34} 35\seealso{ 36 \code{\link{ts}}, \code{\link{time}}, \code{\link{tsp}}. 37} 38\keyword{ts} 39