lubridate v0.1

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by Hadley Wickham

Make dealing with dates a little easier

Lubridate makes it easier to work with dates and times by providing functions to identify and parse date-time data, extract and modify components of a date-time (years, months, days, hours, minutes, and seconds), perform accurate math on date-times, handle time zones and Daylight Savings Time. Lubridate has a consistent, memorable syntax, that makes working with dates fun instead of frustrating.

Functions in lubridate

Name Description
is.instant Is x a date-time object?
am Does date time occur in the am or pm?
second Get/set seconds component of a date-time.
add_period_to_date Addition for the duration (i...
duration Description of time span classes in lubridate.
is.period Is x a period object?
floor_date Round date-times down.
seconds Quickly create relative timespans.
parse_unit_spec Internal function.
is.difftime Is x a duration (difftime) object?
minute Get/set minutes component of a date-time.
sundays Quickly create common epoch objects...
make_difftime Makes a difftime object from given number of seconds...
add_epoch_to_date Add epochs to dates...
pretty.month Internal function...
hour Get/set hours component of a date-time.
lakers Lakers 2008-2009 basketball data set...
hms Create a period with the specified hours, minutes, and seconds...
ymd_hms Parse dates that appear in standard POSIXt order...
ceiling_date Round date-times up.
eseconds Quickly create exact time spans.
is.POSIXt Is x a POSIXct or POSIXlt object?
is.interval Is x an interval object?
force_tz Replace time zone to create new date-time...
new_duration Create a duration object.
combine Internal function.
wday Get/set days component of a date-time.
is.timespan Is x a length of time?
ms Create a period with the specified number of minutes and seconds...
pretty.point Internal function...
make_format Make format...
recognize Internal function.
print.interval Internal function for printing interval objects.
find_separator Identifies the likely separators of a string.
now The current time...
new_period Create a period object.
origin 1970-01-01 GMT...
DateCoercion Convert every date method we know about to POSIXlt and POSIXct...
new_interval Create an interval object.
is.Date Is x a Date object?
decimal_date Converts a date to a decimal of its year.
yday Get/set days component of a date-time.
pretty.year Internal function...
parse_date Change dates into a POSIXct format...
ymd Parse dates according to the order that year, month, and day elements appear...
new_epoch Create an epoch object...
pretty.dates Computes attractive axis breaks for date-time data...
as.POSIXt Internal function.
guess_format Guess the format of dates in a character or numeric vector...
format.period Internal function.
subtract_dates Subtraction for the duration (i...
with_tz Get date-time in a different time zone...
week Get/set weeks component of a date-time.
hm Create a period with the specified number of hours and minutes...
leap.year Is a year a leap year?
pretty.sec Internal function...
print.period Internal method for printing interval objects.
update.POSIXct Changes the components of a date object...
pretty.min Internal function...
pretty.day Internal function...
month Get/set months component of a date-time.
standardise_difftime_names Internal function.
format.interval Internal function.
tz Get/set time zone component of a date-time.
today The current date...
as.duration Change an object to a duration (difftime).
dst Get Daylight Savings Time indicator of a date-time.
as.interval Change an object to an interval.
pretty.hour Internal function...
pretty.unit Internal function...
as.period Change an object to a period.
reclass_date Convenience method to reclass dates post-modification.
num_to_date Internal function...
year Get/set years component of a date-time.
division Division for period, and interval classes.
round_date Rounding for date-times.
multiply Multiplication for period and interval classes.
standardise_date_names Internal function...
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Details

Type Package
License GPL
LazyData true
Collate 'accessors-day.r' 'accessors-hour.r' 'accessors-minute.r' 'accessors-misc.r' 'accessors-month.r' 'accessors-second.r' 'accessors-tz.r' 'accessors-week.r' 'accessors-year.r' 'coercion.r' 'durations.r' 'epochs.r' 'intervals.r' 'ops.durations.r' 'parse.r' 'periods.r' 'pretty.r' 'round.r' 'util.r' 'zzz.r'
Packaged 2010-08-14 17:18:06 UTC; hadley
Repository CRAN
Date/Publication 2010-08-15 04:46:38

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