Time spans

Working with Dates and Times in R

Charlotte Wickham

Instructor

Time spans in lubridate

period

Human concept of a time span
datetime + period of one day =

same time on the next date
variable length

Duration

Stopwatch concept of a time span
datetime + duration of one day =

datetime + 86400 seconds
fixed number of seconds

Creating a time span

days()

"1d 0H 0M 0S"

days(x = 2)

"2d 0H 0M 0S"

ddays(2)

"172800s (~2 days)"

Arithmetic with time spans

2 * days()

"2d 0H 0M 0S"

days() + days()

"2d 0H 0M 0S"

ymd("2011-01-01") + days()

"2011-01-02"

Functions to create time spans

Time span	Duration	Period
Seconds	`dseconds()`	`seconds()`
Minutes	`dminutes()`	`minutes()`
Hours	`dhours()`	`hours()`
Days	`ddays()`	`days()`
Weeks	`dweeks()`	`weeks()`
Months	-	`months()`
Years	`dyears()`	`years()`

Let's practice!

Working with Dates and Times in R

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