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lubridate (version 1.3.3)

Make dealing with dates a little easier

Description

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.

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Version

Install

install.packages('lubridate')

Monthly Downloads

891,165

Version

1.3.3

License

GPL

Maintainer

Garrett Grolemund

Last Published

December 31st, 2013

Functions in lubridate (1.3.3)

Interval-class

Interval class
hm

Create a period with the specified number of hours and minutes
olson_time_zones

Names of available time zones
is.instant

Is x a date-time object?
decimal_date

Converts a date to a decimal of its year.
ms

Create a period with the specified number of minutes and seconds
leap_year

Is a year a leap year?
force_tz

Replace time zone to create new date-time
stamp

Format dates and times based on human-friendly templates.
origin

1970-01-01 UTC
dst

Get Daylight Savings Time indicator of a date-time.
pretty_dates

Computes attractive axis breaks for date-time data
date_decimal

Converts a decimal to a date.
am

Does date time occur in the am or pm?
%m+%

Add and subtract months to a date without exceeding the last day of the new month
minute

Get/set minutes component of a date-time.
Duration-class

Duration class
yday

Get/set days component of a date-time.
new_period

Create a period object.
Period-class

Period class
int_flip

Flip the direction of an interval
today

The current date
now

The current time
timespan

Description of time span classes in lubridate.
int_standardize

Ensures all intervals in an interval object are positive
guess_formats

Guess formats from the supplied date-time character vector.
fit_to_timeline

Fit a POSIXlt date-time to the timeline
new_duration

Create a duration object.
int_aligns

Test if two intervals share an endpoint
is.period

Is x a period object?
is.POSIXt

Is x a POSIXct or POSIXlt object?
hour

Get/set hours component of a date-time.
period

Create a period object.
DateUpdate

Changes the components of a date object
as.interval

Change an object to an interval.
lubridate

Dates and times made easy with lubridate
round_date

Rounding for date-times.
new_difftime

Create a difftime object.
%within%

Tests whether a date or interval falls within an interval
as.duration

Change an object to a duration.
days_in_month

Get the number of days in the month of a date-time.
int_length

Get the length of an interval in seconds
seconds

Quickly create relative timespans.
is.timespan

Is x a length of time?
Timespan-class

Timespan class
is.interval

Is x an Interval object?
int_overlaps

Test if two intervals overlap
DateCoercion

Convert a variety of date-time classes to POSIXlt and POSIXct
ceiling_date

Round date-times up.
int_shift

Shift an interval along the timeline
week

Get/set weeks component of a date-time.
ymd_hms

Parse dates that have hours, minutes, or seconds elements.
period_to_seconds

Convert a period to the number of seconds it appears to represent
as.period

Change an object to a period.
reclass_date

Convenience method to reclass dates post-modification.
floor_date

Round date-times down.
sundays

Quickly create common epoch objects
tz

Get/set time zone component of a date-time.
wday

Get/set days component of a date-time.
here

The current time in your local timezone
second

Get/set seconds component of a date-time.
duration

Create a duration object.
month

Get/set months component of a date-time.
quarter

Get the fiscal quarter of a date-time.
lubridate_formats

Lubridate format orders used in stamp
make_difftime

Makes a difftime object from a given number of seconds
is.duration

Is x a duration object?
year

Get/set years component of a date-time.
int_diff

Extract the intervals within a vector of date-times
hms

Create a period with the specified hours, minutes, and seconds
new_interval

Create an interval object.
rollback

Roll back date to last day of previous month
new_epoch

Create an epoch object
dseconds

Quickly create exact time spans.
lakers

Lakers 2008-2009 basketball data set
int_start

Access and change the start date of an interval
seconds_to_period

Contrive a period from a given number of seconds
reclass_timespan

Convenience method to reclass timespans post-modification.
add_epoch_to_date

Add epochs to dates
parse_date_time

Parse character and numeric date-time vectors with user friendly order formats.
ymd

Parse dates according to the order in that year, month, and day elements appear in the input vector.
int_end

Access and change the end date of an interval
is.difftime

Is x a difftime object?
with_tz

Get date-time in a different time zone
is.Date

Is x a Date object?