clock (version 0.7.1)

duration-rounding: Duration rounding

Description

• duration_floor() rounds a duration down to a multiple of the specified precision.

• duration_ceiling() rounds a duration up to a multiple of the specified precision.

• duration_round() rounds up or down depending on what is closer, rounding up on ties.

Usage

duration_floor(x, precision, ..., n = 1L)
duration_ceiling(x, precision, ..., n = 1L)
duration_round(x, precision, ..., n = 1L)

Value

x rounded to the precision.

Arguments

x

[clock_duration]

A duration.

precision

[character(1)]

A precision. One of:

• "year"

• "quarter"

• "month"

• "week"

• "day"

• "hour"

• "minute"

• "second"

• "millisecond"

• "microsecond"

• "nanosecond"

...

These dots are for future extensions and must be empty.

n

[positive integer(1)]

A positive integer specifying the multiple of precision to use.

Details

You can floor calendrical durations to other calendrical durations, and chronological durations to other chronological durations, but you can't floor a chronological duration to a calendrical duration (such as flooring from day to month). For more information, see the documentation on the duration helper page.

Examples

x <- duration_seconds(c(86399, 86401))

duration_floor(x, "day")
duration_ceiling(x, "day")

# Can't floor from a chronological duration (seconds)
# to a calendrical duration (months)
try(duration_floor(x, "month"))

# Every 2 days, using an origin of day 0
y <- duration_seconds(c(0, 86400, 86400 * 2, 86400 * 3))
duration_floor(y, "day", n = 2)

# Shifting the origin to be day 1
origin <- duration_days(1)
duration_floor(y - origin, "day", n = 2) + origin

# Rounding will round ties up
half_day <- 86400 / 2
half_day_durations <- duration_seconds(c(half_day - 1, half_day, half_day + 1))
duration_round(half_day_durations, "day")

# With larger units
x <- duration_months(c(0, 15, 24))
duration_floor(x, "year")
duration_floor(x, "quarter")