Group date and date-time components — date

date_group() groups by a single component of a date-time, such as month of the year, or day of the month.

There are separate help pages for grouping dates and date-times:

dates (Date)
date-times (POSIXct/POSIXlt)

date_group(x, precision, ..., n = 1L)

Arguments

x

[Date / POSIXct / POSIXlt]

A date or date-time vector.

precision

[character(1)]

A precision. Allowed precisions are dependent on the input used.

...

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 precision.

Examples

# See type specific documentation for more examples
date_group(as.Date("2019-01-01") + 0:5, "day", n = 2)
#> [1] "2019-01-01" "2019-01-01" "2019-01-03" "2019-01-03" "2019-01-05"
#> [6] "2019-01-05"