The R Project SVN R

\name{seq.Date}
\alias{seq.Date}
\title{Generate Regular Sequences of Dates}
\description{
  The methodw for \code{\link{seq}} for date-time classes
}
\usage{
\method{seq}{Date}(from, to, by, length.out=NULL, along.with=NULL, \dots)
}
\arguments{
  \item{from}{starting date. Required}
  \item{to}{end date. Optional. If supplied must be after \code{from}.}
  \item{by}{increment of the sequence. Optional. See Details.}
  \item{length.out}{integer, optional. desired length of the sequence.}
  \item{along.with}{take the length from the length of this argument.}
  \item{\dots}{arguments passed to or from other methods.}
}
\details{
  \code{by} can be specified in several ways.
  \itemize{
    \item A number, taken to be in days.
    \item A object of class \code{\link{difftime}}
    \item A character string, containing one of \code{"day"},
    \code{"week"}, \code{"month"} or \code{"year"}.  This can optionally be
    preceded by an integer and a space, or followed by \code{"s"}.
  }
}
\value{
  A vector of class \code{"Date"}.
}
\seealso{\code{\link{Date}}}

\examples{
## first days of years
seq(as.Date("1910/1/1"), as.Date("1999/1/1"), "years")
## by month
seq(as.Date("2000/1/1"), by="month", length=12)
## quarters
seq(as.Date("2000/1/1"), as.Date("2003/1/1"), by="3 months")
}
\keyword{manip}
\keyword{chron}