How to find Previous Sunday in R

Question

It seems the Internet has not answered this question for R yet:

If I have a date. Say the 20th of march: as.Date(\"2015-03-20\") how do I get, in R, the previous Sun

Answer 1

cut(date_var, breaks='week', start.on.monday = F)

This works for me. It is available in base r and is bound to be faster. breaks can be used to find start of day, week, month, quarter, year.

Read ?cut & ?cut.Date

Sys.Date()

[1] "2017-12-23"

cut(Sys.Date(), breaks = 'week', start.on.monday = F)

[1] 2017-12-17 Levels: 2017-12-17

cut(Sys.Date(), breaks = 'month')

[1] 2017-12-01 Levels: 2017-12-01

cut(Sys.Date(), breaks = 'quarter')

[1] 2017-10-01 Levels: 2017-10-01

cut(Sys.Date(), breaks = 'year')

[1] 2017-01-01 Levels: 2017-01-01