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\name{seq.dates}
\alias{seq.dates}
\title{
Generate Chron or Dates Sequences
}
\description{
Generate a regular sequence of dates.
}
\usage{
\method{seq}{dates}(from, to, by = "days", length., \dots)
}
\arguments{
\item{from}{starting date; it can be a chron or dates object, a
character string, e.g., \code{"05/23/91"}, or a Julian date.}
\item{to}{ending date, like \code{from}.}
\item{by}{either a numeric value or one of the valid strings
\code{"days"}, \code{"weeks"}, \code{"months"}, or \code{"years"}.}
\item{length.}{optional number of elements in the sequence.}
\item{\dots}{further arguments to be passed to or from methods.}
}
\value{a sequence with values (\code{from}, \code{from + by},
\code{from + 2*by}, \dots, \code{to}) of class
\code{class(from)} and origin \code{origin(from)}.
Note that \code{from} must be less than or equal to the argument
\code{to}.
}
\examples{
seq.dates("01/01/92", "12/31/92", by = "months")
# [1] 01/01/92 02/01/92 03/01/92 04/01/92 05/01/92 06/01/92
# [7] 07/01/92 08/01/92 09/01/92 10/01/92 11/01/92 12/01/92
end.of.the.month <- seq.dates("02/29/92", by = "month", length = 15)
end.of.the.month
# [1] 02/29/92 03/31/92 04/30/92 05/31/92 06/30/92 07/31/92
# [7] 08/31/92 09/30/92 10/31/92 11/30/92 12/31/92 01/31/93
# [13] 02/28/93 03/31/93 04/30/93
}
\seealso{
\code{\link{chron}},
\code{\link{dates}},
\code{\link{cut.dates}}
}
\keyword{chron}
|
