| % File src/library/base/man/Ops.Date.Rd |
| % Part of the R package, https://www.R-project.org |
| % Copyright 1995-2009 R Core Team |
| % Distributed under GPL 2 or later |
| |
| \name{Ops.Date} |
| \alias{+.Date} |
| \alias{-.Date} |
| \alias{Ops.Date} |
| |
| \title{Operators on the Date Class} |
| \description{ |
| Operators for the \code{"\link{Date}"} class. |
| |
| There is an \code{\link[=S3groupGeneric]{Ops}} method and specific |
| methods for \code{+} and \code{-} for the \code{\link{Date}} class. |
| } |
| \usage{ |
| \special{date + x} |
| \special{x + date} |
| \special{date - x} |
| \special{date1 lop date2} |
| } |
| \arguments{ |
| \item{date}{date objects} |
| \item{date1, date2}{date objects or character vectors. (Character |
| vectors are converted by \code{\link{as.Date}}.)} |
| \item{x}{a numeric vector (in days) \emph{or} an object of class |
| \code{"\link{difftime}"}, rounded to the nearest whole day.} |
| \item{lop}{One of \code{==}, \code{!=}, \code{<}, \code{<=}, \code{>} |
| or \code{>=}.} |
| } |
| \details{ |
| \code{x} does not need to be integer if specified as a numeric vector, |
| but see the comments about fractional days in the help for |
| \code{\link{Dates}}. |
| } |
| \examples{\donttest{ |
| (z <- Sys.Date()) |
| z + 10 |
| z < c("2009-06-01", "2010-01-01", "2015-01-01") |
| }} |
| \keyword{utilities} |
| \keyword{chron} |