dseconds

From lubridate v1.2.0 by Garrett Grolemund

Quickly create exact time spans.

Quickly create Duration objects for easy date-time manipulation. The units of the duration created depend on the name of the function called. For Duration objects, units are equal to their most common lengths in seconds (i.e. minutes = 60 seconds, hours = 3600 seconds, days = 86400 seconds, weeks = 604800, years = 31536000).

Keywords: manip, chron

Usage

dseconds(x = 1)

Arguments

x: numeric value of the number of units to be contained in the duration.

Details

When paired with date-times, these functions allow date-times to be manipulated in a method similar to object oriented programming. Duration objects can be added to Date, POSIXt, and Interval objects.

Value

a duration object

Examples

dseconds(1)
# 1s
dminutes(3.5)
# 210s (~3.5 minutes)

x <- as.POSIXct("2009-08-03")
# "2009-08-03 CDT"
x + ddays(1) + dhours(6) + dminutes(30)
# "2009-08-04 06:30:00 CDT"
x + ddays(100) - dhours(8)
# "2009-11-10 15:00:00 CST"

class(as.Date("2009-08-09") + ddays(1)) # retains Date class
# "Date"
as.Date("2009-08-09") + dhours(12)
# "2009-08-09 12:00:00 UTC"
class(as.Date("2009-08-09") + dhours(12))
# "POSIXct" "POSIXt"
# converts to POSIXt class to accomodate time units

dweeks(1) - ddays(7)
# 0s
c(1:3) * dhours(1)
# 3600s (~1 hours)  7200s (~2 hours)  10800s (~3 hours)
#
# compare DST handling to durations
boundary <- as.POSIXct("2009-03-08 01:59:59")
# "2009-03-08 01:59:59 CST"
boundary + days(1) # period
# "2009-03-09 01:59:59 CDT" (clock time advances by a day)
boundary + ddays(1) # duration
# "2009-03-09 02:59:59 CDT" (clock time corresponding to 86400 seconds later)

Documentation reproduced from package lubridate, version 1.2.0, License: GPL

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