date_part | R Documentation |
These date helper functions provide the similar functionalities like in data.table
or
lubridate
package. They are implemented by the Rust Lang's standard library and very
fast.
year(ref_date)
month(ref_date)
quarter(ref_date)
isoweek(ref_date)
isowday(ref_date)
wday(ref_date)
mday(ref_date)
yday(ref_date)
ref_date |
a Date vector. It will try to convert the input to date via |
year, month, quarter: get the year, month, quarter part
yday: the day of year
mday: the day of month
wday: the day of the week (Sunday is 1)
isoweek: ISO 8601 week
isowday: the day of week (ISO 8601 weekday number, Monday is 1)
an integer vector
ISO week day, https://en.wikipedia.org/wiki/ISO_week_date ISO 8601, https://en.wikipedia.org/wiki/ISO_8601
year(210205)
month(210205)
quarter(210205)
yday(210205)
mday(210205)
wday(210117)
isowday(210117)
isoweek(210101)
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