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make_difftime() creates a difftime object with the specified number of
units. Entries for different units are cumulative. difftime displays
durations in various units, but these units are estimates given for
convenience. The underlying object is always recorded as a fixed number of
seconds.
make_difftime(num = NULL, units = "auto", ...)a difftime object
Optional number of seconds
a character vector that lists the type of units to use for the
display of the return value (see examples). If units is "auto" (the
default) the display units are computed automatically. This might create
undesirable effects when converting difftime objects to numeric
values in data processing.
a list of time units to be included in the difftime and their amounts. Seconds,
minutes, hours, days, and weeks are supported. Normally only one of num or ... are present. If
both are present, the difftime objects are concatenated.
Conceptually, difftime objects are a type of duration. They measure the exact passage of time but do not always align with measurements made in larger units of time such as hours, months and years. This is because the length of larger time units can be affected by conventions such as leap years and Daylight Savings Time. lubridate provides a second class for measuring durations, the Duration class.
duration(), as.duration()
make_difftime(1)
make_difftime(60)
make_difftime(3600)
make_difftime(3600, units = "minute")
# Time difference of 60 mins
make_difftime(second = 90)
# Time difference of 1.5 mins
make_difftime(minute = 1.5)
# Time difference of 1.5 mins
make_difftime(second = 3, minute = 1.5, hour = 2, day = 6, week = 1)
# Time difference of 13.08441 days
make_difftime(hour = 1, minute = -60)
# Time difference of 0 secs
make_difftime(day = -1)
# Time difference of -1 days
make_difftime(120, day = -1, units = "minute")
# Time differences in mins
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