lubridate v0.2.2


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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.interval Is x an interval object?
is.timespan Is x a length of time?
hour Get/set hours component of a date-time.
add_dates Adding date-time objects...
is.difftime Is x a difftime object?
ms Create a period with the specified number of minutes and seconds...
duration Description of time span classes in lubridate.
is.period Is x a period object?
floor_date Round date-times down.
make_difftime Makes a difftime object from a given number of seconds...
month Get/set months component of a date-time.
decimal_date Converts a date to a decimal of its year.
as.interval Change an object to an interval.
minute Get/set minutes component of a date-time.
origin 1970-01-01 GMT...
force_tz Replace time zone to create new date-time...
lakers Lakers 2008-2009 basketball data set...
new_interval Create an interval object.
as.period Change an object to a period.
am Does date time occur in the am or pm?
hms Create a period with the specified hours, minutes, and seconds...
hm Create a period with the specified number of hours and minutes...
leap_year Is a year a leap year?
add_epoch_to_date Add epochs to dates...
is.Date Is x a Date object?
is.POSIXt Is x a POSIXct or POSIXlt object?
ceiling_date Round date-times up.
is.instant Is x a date-time object?
DateUpdate Changes the components of a date object...
as.duration Change an object to a duration (difftime).
end Access and change the end date of an interval...
second Get/set seconds component of a date-time.
reclass_date Convenience method to reclass dates post-modification.
parse_date Change dates into a POSIXct format...
pretty.dates Computes attractive axis breaks for date-time data...
today The current date...
DateCoercion Convert every date method we know about to POSIXlt and POSIXct...
new_difftime Create a difftime object.
new_duration Create a duration object.
dst Get Daylight Savings Time indicator of a date-time.
wday Get/set days component of a date-time.
now The current time...
is.duration Is x a duration object?
sundays Quickly create common epoch objects...
new_epoch Create an epoch object...
subtract_dates Subtracting date-time objects...
new_period Create a period object.
seconds Quickly create relative timespans.
tz Get/set time zone component of a date-time.
dseconds Quickly create exact time spans.
ymd_hms Parse dates that have hours, minutes, or seconds elements...
with_tz Get date-time in a different time zone...
start Access and change the start date of an interval...
year Get/set years component of a date-time.
yday Get/set days component of a date-time.
ymd Parse dates according to the order that year, month, and day elements appear...
round_date Rounding for date-times.
week Get/set weeks component of a date-time.
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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' 'help.r' 'zzz.r'
Packaged 2010-11-16 18:16:56 UTC; garrettgrolemund
Repository CRAN
Date/Publication 2010-11-17 08:17:25

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