time_length
From lubridate v1.5.6
by Vitalie Spinu
Compute the exact length of a time span.
Compute the exact length of a time span.
Usage
time_length(x, unit = "second")
"time_length"(x, unit = "second")Arguments
- x
- a duration, period, difftime or interval
- unit
- a character string that specifies with time units to use
Details
When x is an Interval-class object and
unit are years or months, timespan_length takes into account
the fact that all months and years don't have the same number of days.
When x is a Duration-class, Period-class
or difftime object, length in months or years is based on their
most common lengths in seconds (see timespan).
Value
-
the length of the interval in the specified unit. A negative number
connotes a negative interval or duration
See Also
Examples
int <- interval(ymd("1980-01-01"), ymd("2014-09-18"))
time_length(int, "week")
# Exact age
time_length(int, "year")
# Age at last anniversary
trunc(time_length(int, "year"))
# Example of difference between intervals and durations
int <- interval(ymd("1900-01-01"), ymd("1999-12-31"))
time_length(int, "year")
time_length(as.duration(int), "year")
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