This is a year-month-weekday method for the calendar_group() generic.
Grouping for a year-month-weekday object can be done at any precision except
for "day", as long as x is at least as precise as precision.
# S3 method for clock_year_month_weekday
calendar_group(x, precision, ..., n = 1L)x grouped at the specified precision.
[clock_year_month_weekday]
A year-month-weekday vector.
[character(1)]
One of:
"year"
"month"
"hour"
"minute"
"second"
"millisecond"
"microsecond"
"nanosecond"
These dots are for future extensions and must be empty.
[positive integer(1)]
A single positive integer specifying a multiple of precision to use.
Grouping by "day" is undefined for a year-month-weekday because there are
two day fields, the weekday and the index, and there is no clear way to
define how to group by that.
x <- year_month_weekday(2019, 1:12, clock_weekdays$sunday, 1, 00, 05, 05)
x
# Group by 3 months - drops more precise components!
calendar_group(x, "month", n = 3)
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