R Language lubridate Rounding dates
Example
now_dt <- ymd_hms(now(), tz="IST")
now_dt
## [1] "2016-07-22 13:53:09 IST"
round_date() takes a date-time object and rounds it to the nearest integer value of the specified time unit.
round_date(now_dt, "minute")
## [1] "2016-07-22 13:53:00 IST"
round_date(now_dt, "hour")
## [1] "2016-07-22 14:00:00 IST"
round_date(now_dt, "year")
## [1] "2017-01-01 IST"
floor_date() takes a date-time object and rounds it down to the nearest integer value of the specified time unit.
floor_date(now_dt, "minute")
## [1] "2016-07-22 13:53:00 IST"
floor_date(now_dt, "hour")
## [1] "2016-07-22 13:00:00 IST"
floor_date(now_dt, "year")
## [1] "2016-01-01 IST"
ceiling_date() takes a date-time object and rounds it up to the nearest integer value of the specified time unit.
ceiling_date(now_dt, "minute")
## [1] "2016-07-22 13:54:00 IST"
ceiling_date(now_dt, "hour")
## [1] "2016-07-22 14:00:00 IST"
ceiling_date(now_dt, "year")
## [1] "2017-01-01 IST"
