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lubridate (version 1.2.0)

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

837,359

Version

1.2.0

License

GPL

Maintainer

Garrett Grolemund

Last Published

October 4th, 2012

Functions in lubridate (1.2.0)

force_tz

Replace time zone to create new date-time
Interval-class

Interval class
decimal_date

Converts a date to a decimal of its year.
DateUpdate

Changes the components of a date object
int_length

Get the length of an interval in seconds
int_diff

Extract the intervals within a vector of date-times
int_end

Access and change the end date of an interval
DateCoercion

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

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

Convert a period to the number of units it appears to represent
hour

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

Round date-times down.
Timespan-class

Timespan class
am

Does date time occur in the am or pm?
lubridate_formats

Lubridate format orders used in ymd, hms and ymd_hms family of functions.
as.duration

Change an object to a duration.
int_start

Access and change the start date of an interval
int_overlaps

Test if two intervals overlap
new_interval

Create an interval object.
Duration-class

Duration class
origin

1970-01-01 GMT
int_aligns

Test if two intervals share an endpoint
int_standardize

Ensures all intervals in an interval object are positive
new_period

Create a period object.
pretty_dates

Computes attractive axis breaks for date-time data
lakers

Lakers 2008-2009 basketball data set
new_difftime

Create a difftime object.
%m+%

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

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

Is x a duration object?
duration

Create a duration object.
is.period

Is x a period object?
minute

Get/set minutes component of a date-time.
int_shift

Shift an interval along the timeline
is.interval

Is x an Interval object?
lubridate

Dates and times made easy with lubridate
dseconds

Quickly create exact time spans.
hm

Create a period with the specified number of hours and minutes
is.POSIXt

Is x a POSIXct or POSIXlt object?
as.period

Change an object to a period.
is.instant

Is x a date-time object?
ceiling_date

Round date-times up.
sundays

Quickly create common epoch objects
ms

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

Quickly create relative timespans.
stamp

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

The current time
with_tz

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

Is x a length of time?
Period-class

Period class
month

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

Is a year a leap year?
is.difftime

Is x a difftime object?
as.interval

Change an object to an interval.
timespan

Description of time span classes in lubridate.
new_epoch

Create an epoch object
second

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

Flip the direction of an interval
reclass_date

Convenience method to reclass dates post-modification.
ymd_hms

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

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

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

Convenience method to reclass timespans post-modification.
%within%

Tests whether a date or interval falls within an interval
period

Create a period object.
today

The current date
new_duration

Create a duration object.
add_epoch_to_date

Add epochs to dates
dst

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

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

Rounding for date-times.
make_difftime

Makes a difftime object from a given number of seconds
rollback

Roll back date to last day of previous month
wday

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

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

Get the fiscal quarter of a date-time.
parse_date

Deprecated internal function, use parse_date_time instead.
ymd

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

Is x a Date object?
hms

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

Function to parse character and numeric date-time vectors with user friendly order formats.