round_date

From lubridate v0.1 by Hadley Wickham

Rounding for date-times.

Keywords: manip, chron

Usage

round_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."

Details

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

Value

x with the appropriate units rounded

Examples

x <- as.POSIXct("2009-08-03 12:01:59.23")
round_date(x, "second")
# "2009-08-03 12:01:59 CDT"
round_date(x, "minute")
# "2009-08-03 12:02:00 CDT"
round_date(x, "hour")
# "2009-08-03 12:00:00 CDT"
round_date(x, "day")
# "2009-08-04 CDT"
round_date(x, "week")
# "2009-08-02 CDT"
round_date(x, "month")
# "2009-08-01 CDT"
round_date(x, "year")
# "2010-01-01 CST"}

Documentation reproduced from package lubridate, version 0.1, License: GPL

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