Grouping: year-month-weekday

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.

Usage

# S3 method for class 'clock_year_month_weekday'
calendar_group(x, precision, ..., n = 1L)

Arguments

x

[clock_year_month_weekday]

A year-month-weekday vector.

precision

[character(1)]

One of:

• "year"

• "month"

• "hour"

• "minute"

• "second"

• "millisecond"

• "microsecond"

• "nanosecond"

...

These dots are for future extensions and must be empty.

n

[positive integer(1)]

A single positive integer specifying a multiple of precision to use.

Value

x grouped at the specified precision.

Details

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.

Examples

x <- year_month_weekday(2019, 1:12, clock_weekdays$sunday, 1, 00, 05, 05)
x
#> <year_month_weekday<second>[12]>
#>  [1] "2019-01-Sun[1]T00:05:05" "2019-02-Sun[1]T00:05:05"
#>  [3] "2019-03-Sun[1]T00:05:05" "2019-04-Sun[1]T00:05:05"
#>  [5] "2019-05-Sun[1]T00:05:05" "2019-06-Sun[1]T00:05:05"
#>  [7] "2019-07-Sun[1]T00:05:05" "2019-08-Sun[1]T00:05:05"
#>  [9] "2019-09-Sun[1]T00:05:05" "2019-10-Sun[1]T00:05:05"
#> [11] "2019-11-Sun[1]T00:05:05" "2019-12-Sun[1]T00:05:05"

# Group by 3 months - drops more precise components!
calendar_group(x, "month", n = 3)
#> <year_month_weekday<month>[12]>
#>  [1] "2019-01" "2019-01" "2019-01" "2019-04" "2019-04" "2019-04" "2019-07"
#>  [8] "2019-07" "2019-07" "2019-10" "2019-10" "2019-10"