How do i find week number from an arbitrary start date in R?

Question

How do I find the week number from an arbitrary start date in R. Let's say I want my start date to be august 1st.

Possibly helpful: https://stackoverflow.com/questions/14454476/get-the-difference-between-dates-in-terms-of-weeks-months-quarters-and-years — MrFlick, Jan 21 '20 at 18:59
How about this: `difftime("2020-08-21", Sys.Date(), units = "weeks")`? — sm925, Jan 21 '20 at 19:01

tmfmnk · Answer 1 · 2020-01-21T19:06:54.877

1

Using lubridate, you can do:

interval(today(), dmy("21-08-2020"))/weeks(1)

[1] 30.42857

Or from the date of interest to another date:

interval(dmy("21-08-2020"), dmy("21-09-2020"))/weeks(1)

[1] 4.428571

edited Jan 21 '20 at 19:06

answered Jan 21 '20 at 18:53

tmfmnk

score 0 · Accepted Answer · answered Jan 21 '20 at 19:02

0

You can use difftime for this:

difftime("2020-08-21", Sys.Date(), units = "weeks")
# Time difference of 30.45238 weeks

answered Jan 21 '20 at 19:02

sm925

2 Answers2