new_interval
Create an interval object.
interval creates an 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.
Usage
new_interval(start, end, tzone = attr(start, "tzone"))Arguments
- start
- a POSIXt or Date date-time object
- end
- a POSIXt or Date date-time object
- tzone
- a recognized timezone to display the interval in
Details
Intervals are time spans bound by two real date-times.
Intervals can be accurately converted to either period or
duration objects using as.period,
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.
%--% 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.
Value
- an Interval object
See Also
Examples
new_interval(ymd(20090201), ymd(20090101))
# 2009-02-01 UTC--2009-01-01 UTC
date1 <- 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 CST
new_interval(date1, date2)
# 2009-03-08 01:59:59 CST--2000-02-29 12:00:00 CST
span <- new_interval(ymd(20090101), ymd(20090201))
# 2009-01-01 UTC--2009-02-01 UTC