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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 \name{new_interval}\alias{\%--\%}\alias{interval}\alias{new_interval}\title{Create an interval object.}\usage{  new_interval(start, end, tzone = attr(start, "tzone"))}\arguments{  \item{start}{a POSIXt or Date date-time object}  \item{end}{a POSIXt or Date date-time object}  \item{tzone}{a recognized timezone to display the  interval in}}\value{  an Interval object}\description{  interval creates an \code{\link{Interval-class}} object  with the specified start and end dates. If the start date  occurs before the end date, the interval will be  positive. Otherwise, it will be negative.}\details{  Intervals are time spans bound by two real date-times.  Intervals can be accurately converted to either period or  duration objects using \code{\link{as.period}},  \code{\link{as.duration}}. Since an interval is anchored  to a fixed history of time, both the exact number of  seconds that passed and the number of variable length  time units that occurred during the interval can be  calculated.  \code{\%--\%} Creates an interval that covers the range  spanned by two dates. It replaces the original behavior  of lubridate, which created an interval by default  whenever two date-times were subtracted.}\examples{new_interval(ymd(20090201), ymd(20090101))# 2009-02-01 UTC--2009-01-01 UTCdate1 <- as.POSIXct("2009-03-08 01:59:59")date2 <- as.POSIXct("2000-02-29 12:00:00")new_interval(date2, date1)# 2000-02-29 12:00:00 CST--2009-03-08 01:59:59 CSTnew_interval(date1, date2)# 2009-03-08 01:59:59 CST--2000-02-29 12:00:00 CSTspan <- new_interval(ymd(20090101), ymd(20090201))# 2009-01-01 UTC--2009-02-01 UTC}\seealso{  \code{\link{Interval-class}}, \code{\link{as.interval}}}
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