floor_date

From lubridate v1.2.0 by Garrett Grolemund

Round date-times down.

floor_date takes a date-time object and rounds it down to the nearest integer value of the specified time unit. Users can specify whether to round down to the nearest second, minute, hour, day, week, month, or year.

Keywords: manip, chron

Usage

floor_date(x,
    unit = c("second", "minute", "hour", "day", "week", "month", "year"))

Arguments

x: a vector of date-time objects
unit: a character string specifying the time unit to be rounded to. Should be one of "second","minute","hour","day", "week", "month", or "year."

Value

x with the appropriate units floored

Examples

x <- as.POSIXct("2009-08-03 12:01:59.23")
floor_date(x, "second")
# "2009-08-03 12:01:59 CDT"
floor_date(x, "minute")
# "2009-08-03 12:01:00 CDT"
floor_date(x, "hour")
# "2009-08-03 12:00:00 CDT"
floor_date(x, "day")
# "2009-08-03 CDT"
floor_date(x, "week")
# "2009-08-02 CDT"
floor_date(x, "month")
# "2009-08-01 CDT"
floor_date(x, "year")
# "2009-01-01 CST"

Documentation reproduced from package lubridate, version 1.2.0, License: GPL

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