
This is a year-month-day method for the calendar_start()
and
calendar_end()
generics. They adjust components of a calendar to the
start or end of a specified precision
.
# S3 method for clock_year_month_day
calendar_start(x, precision)# S3 method for clock_year_month_day
calendar_end(x, precision)
x
at the same precision, but with some components altered to be
at the boundary value.
[clock_year_month_day]
A year-month-day vector.
[character(1)]
One of:
"year"
"month"
"day"
"hour"
"minute"
"second"
"millisecond"
"microsecond"
"nanosecond"
# Hour precision
x <- year_month_day(2019, 2:4, 5, 6)
x
# Compute the start of the month
calendar_start(x, "month")
# Or the end of the month, notice that the hour value is adjusted as well
calendar_end(x, "month")
# Compare that with just setting the day of the month to `"last"`, which
# doesn't adjust any other components
set_day(x, "last")
# You can't compute the start / end at a more precise precision than
# the input is at
try(calendar_start(x, "second"))
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