Make dealing with dates a little easier

Documentation for package ‘lubridate’ version 1.3.3

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A C D E F G H I L M N O P Q R S T U W Y misc

Dates and times made easy with lubridate

-- A --

add_epoch_to_date	Add epochs to dates
am	Does date time occur in the am or pm?
as.character-method	Duration class
as.character-method	Interval class
as.character-method	Period class
as.difftime-method	Duration class
as.difftime-method	Interval class
as.difftime-method	Period class
as.duration	Change an object to a duration.
as.duration-method	Change an object to a duration.
as.interval	Change an object to an interval.
as.interval-method	Change an object to an interval.
as.numeric-method	Duration class
as.numeric-method	Interval class
as.numeric-method	Period class
as.period	Change an object to a period.
as.period-method	Change an object to a period.

-- C --

c-method	Duration class
c-method	Interval class
c-method	Period class
ceiling_date	Round date-times up.

-- D --

DateUpdate	Changes the components of a date object
date_decimal	Converts a decimal to a date.
day	Get/set days component of a date-time.
day-method	Period class
day<-	Get/set days component of a date-time.
day<--method	Period class
days	Quickly create relative timespans.
days_in_month	Get the number of days in the month of a date-time.
ddays	Quickly create exact time spans.
decimal_date	Converts a date to a decimal of its year.
dhours	Quickly create exact time spans.
dmicroseconds	Quickly create exact time spans.
dmilliseconds	Quickly create exact time spans.
dminutes	Quickly create exact time spans.
dmy	Parse dates according to the order in that year, month, and day elements appear in the input vector.
dmy_h	Parse dates that have hours, minutes, or seconds elements.
dmy_hm	Parse dates that have hours, minutes, or seconds elements.
dmy_hms	Parse dates that have hours, minutes, or seconds elements.
dnanoseconds	Quickly create exact time spans.
dpicoseconds	Quickly create exact time spans.
dseconds	Quickly create exact time spans.
dst	Get Daylight Savings Time indicator of a date-time.
duration	Create a duration object.
Duration-class	Duration class
dweeks	Quickly create exact time spans.
dyears	Quickly create exact time spans.
dym	Parse dates according to the order in that year, month, and day elements appear in the input vector.

-- E --

edays	Quickly create exact time spans.
ehours	Quickly create exact time spans.
emicroseconds	Quickly create exact time spans.
emilliseconds	Quickly create exact time spans.
eminutes	Quickly create exact time spans.
enanoseconds	Quickly create exact time spans.
epicoseconds	Quickly create exact time spans.
eseconds	Quickly create exact time spans.
eweeks	Quickly create exact time spans.
eyears	Quickly create exact time spans.

-- F --

fast_strptime	Parse character and numeric date-time vectors with user friendly order formats.
fit_to_timeline	Fit a POSIXlt date-time to the timeline
floor_date	Round date-times down.
force_tz	Replace time zone to create new date-time
fridays	Quickly create common epoch objects

-- G --

guess_formats

Guess formats from the supplied date-time character vector.

-- H --

here	The current time in your local timezone
hm	Create a period with the specified number of hours and minutes
hms	Create a period with the specified hours, minutes, and seconds
hour	Get/set hours component of a date-time.
hour-method	Period class
hour<-	Get/set hours component of a date-time.
hour<--method	Period class
hours	Quickly create relative timespans.

-- I --

instant	Is x a date-time object?
instants	Is x a date-time object?
intersect-method	Interval class
interval	Create an interval object.
Interval-class	Interval class
int_aligns	Test if two intervals share an endpoint
int_diff	Extract the intervals within a vector of date-times
int_end	Access and change the end date of an interval
int_end<-	Access and change the end date of an interval
int_flip	Flip the direction of an interval
int_length	Get the length of an interval in seconds
int_overlaps	Test if two intervals overlap
int_shift	Shift an interval along the timeline
int_standardize	Ensures all intervals in an interval object are positive
int_start	Access and change the start date of an interval
int_start<-	Access and change the start date of an interval
is.Date	Is x a Date object?
is.difftime	Is x a difftime object?
is.duration	Is x a duration object?
is.instant	Is x a date-time object?
is.interval	Is x an Interval object?
is.period	Is x a period object?
is.POSIXct	Is x a POSIXct or POSIXlt object?
is.POSIXlt	Is x a POSIXct or POSIXlt object?
is.POSIXt	Is x a POSIXct or POSIXlt object?
is.timepoint	Is x a date-time object?
is.timespan	Is x a length of time?
isoweek	Get/set weeks component of a date-time.

-- L --

lakers	Lakers 2008-2009 basketball data set
leap_year	Is a year a leap year?
lubridate	Dates and times made easy with lubridate
lubridate_formats	Lubridate format orders used in 'stamp'

-- M --

m+	Add and subtract months to a date without exceeding the last day of the new month
m-	Add and subtract months to a date without exceeding the last day of the new month
make_difftime	Makes a difftime object from a given number of seconds
mday	Get/set days component of a date-time.
mday<-	Get/set days component of a date-time.
mdy	Parse dates according to the order in that year, month, and day elements appear in the input vector.
mdy_h	Parse dates that have hours, minutes, or seconds elements.
mdy_hm	Parse dates that have hours, minutes, or seconds elements.
mdy_hms	Parse dates that have hours, minutes, or seconds elements.
microseconds	Quickly create relative timespans.
milliseconds	Quickly create relative timespans.
minute	Get/set minutes component of a date-time.
minute-method	Period class
minute<-	Get/set minutes component of a date-time.
minute<--method	Period class
minutes	Quickly create relative timespans.
mondays	Quickly create common epoch objects
month	Get/set months component of a date-time.
month-method	Period class
month<-	Get/set months component of a date-time.
month<--method	Period class
ms	Create a period with the specified number of minutes and seconds
myd	Parse dates according to the order in that year, month, and day elements appear in the input vector.

-- N --

nanoseconds	Quickly create relative timespans.
new_difftime	Create a difftime object.
new_duration	Create a duration object.
new_epoch	Create an epoch object
new_interval	Create an interval object.
new_period	Create a period object.
now	The current time

-- O --

olson_time_zones	Names of available time zones
origin	1970-01-01 UTC

-- P --

parse_date_time	Parse character and numeric date-time vectors with user friendly order formats.
parse_date_time2	Parse character and numeric date-time vectors with user friendly order formats.
period	Create a period object.
Period-class	Period class
period_to_seconds	Convert a period to the number of seconds it appears to represent
picoseconds	Quickly create relative timespans.
pm	Does date time occur in the am or pm?
pretty.dates	Computes attractive axis breaks for date-time data
pretty.day	Computes attractive axis breaks for date-time data
pretty.hour	Computes attractive axis breaks for date-time data
pretty.min	Computes attractive axis breaks for date-time data
pretty.month	Computes attractive axis breaks for date-time data
pretty.point	Computes attractive axis breaks for date-time data
pretty.sec	Computes attractive axis breaks for date-time data
pretty.unit	Computes attractive axis breaks for date-time data
pretty.year	Computes attractive axis breaks for date-time data
pretty_dates	Computes attractive axis breaks for date-time data

-- Q --

quarter

Get the fiscal quarter of a date-time.

-- R --

rep-method	Duration class
rep-method	Interval class
rep-method	Period class
rollback	Roll back date to last day of previous month
round_date	Rounding for date-times.

-- S --

saturdays	Quickly create common epoch objects
second	Get/set seconds component of a date-time.
second-method	Period class
second<-	Get/set seconds component of a date-time.
second<--method	Period class
seconds	Quickly create relative timespans.
seconds_to_period	Contrive a period from a given number of seconds
setdiff-method	Interval class
show-method	Duration class
show-method	Interval class
show-method	Period class
stamp	Format dates and times based on human-friendly templates.
stamp_date	Format dates and times based on human-friendly templates.
stamp_time	Format dates and times based on human-friendly templates.
sundays	Quickly create common epoch objects

-- T --

thursdays	Quickly create common epoch objects
timepoint	Is x a date-time object?
timespan	Description of time span classes in lubridate.
Timespan-class	Timespan class
timespans	Description of time span classes in lubridate.
today	The current date
tuesdays	Quickly create common epoch objects
tz	Get/set time zone component of a date-time.
tz<-	Get/set time zone component of a date-time.

-- U --

union-method

Interval class

-- W --

wday	Get/set days component of a date-time.
wday<-	Get/set days component of a date-time.
wednesdays	Quickly create common epoch objects
week	Get/set weeks component of a date-time.
week<-	Get/set weeks component of a date-time.
weeks	Quickly create relative timespans.
with_tz	Get date-time in a different time zone

-- Y --

yday	Get/set days component of a date-time.
yday<-	Get/set days component of a date-time.
ydm	Parse dates according to the order in that year, month, and day elements appear in the input vector.
ydm_h	Parse dates that have hours, minutes, or seconds elements.
ydm_hm	Parse dates that have hours, minutes, or seconds elements.
ydm_hms	Parse dates that have hours, minutes, or seconds elements.
year	Get/set years component of a date-time.
year-method	Period class
year<-	Get/set years component of a date-time.
year<--method	Period class
yearmonthdate	Parse dates according to the order in that year, month, and day elements appear in the input vector.
years	Quickly create relative timespans.
ymd	Parse dates according to the order in that year, month, and day elements appear in the input vector.
ymd_h	Parse dates that have hours, minutes, or seconds elements.
ymd_hm	Parse dates that have hours, minutes, or seconds elements.
ymd_hms	Parse dates that have hours, minutes, or seconds elements.

-- misc --

!=-method	Period class
$-method	Duration class
$-method	Interval class
$-method	Period class
$<--method	Duration class
$<--method	Interval class
$<--method	Period class
%%-method	Duration class
%%-method	Interval class
%%-method	Period class
%--%	Create an interval object.
%/%-method	Timespan class
%m+%	Add and subtract months to a date without exceeding the last day of the new month
%m+%-method	Add and subtract months to a date without exceeding the last day of the new month
%m-%	Add and subtract months to a date without exceeding the last day of the new month
%m-%-method	Add and subtract months to a date without exceeding the last day of the new month
%within%	Tests whether a date or interval falls within an interval
%within%-method	Tests whether a date or interval falls within an interval
*-method	Duration class
*-method	Interval class
*-method	Period class
*-method	Timespan class
+-method	Duration class
+-method	Interval class
+-method	Period class
--method	Duration class
--method	Interval class
--method	Period class
/-method	Duration class
/-method	Interval class
/-method	Period class
<-method	Period class
<=-method	Period class
==-method	Period class
>-method	Period class
>=-method	Period class
[-method	Duration class
[-method	Interval class
[-method	Period class
[<--method	Duration class
[<--method	Interval class
[<--method	Period class
[[-method	Duration class
[[-method	Interval class
[[-method	Period class
[[<--method	Duration class
[[<--method	Interval class
[[<--method	Period class