Make Dealing with Dates a Little Easier

Documentation for package ‘lubridate’ version 1.6.0

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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_with_rollback	Add and subtract months to a date without exceeding the last day of the new month
am	Does date time occur in the am or pm?
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.period	Change an object to a period.
as.period-method	Change an object to a period.
as_date	Convert an object to a date or date-time
as_date-method	Convert an object to a date or date-time
as_datetime	Convert an object to a date or date-time
as_datetime-method	Convert an object to a date or date-time

-- C --

ceiling_date

Round, floor and ceiling methods for date-time objects.

-- D --

date	Get/set Date component of a date-time.
date<-	Get/set Date component of a date-time.
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<-	Get/set days component of a date-time.
days	Quickly create period objects.
days_in_month	Get the number of days in the month of a date-time.
ddays	Quickly create duration objects.
decimal_date	Converts a date to a decimal of its year.
Deprecated-lubridate	Deprecated function in 'lubridate' package
dhours	Quickly create duration objects.
dmicroseconds	Quickly create duration objects.
dmilliseconds	Quickly create duration objects.
dminutes	Quickly create duration objects.
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 duration objects.
dpicoseconds	Quickly create duration objects.
dseconds	Quickly create duration objects.
dst	Get Daylight Savings Time indicator of a date-time.
duration	Create a duration object.
Duration-class	Duration class
dweeks	Quickly create duration objects.
dyears	Quickly create duration objects.
dym	Parse dates according to the order in that year, month, and day elements appear in the input vector.

-- E --

edays	Deprecated function in 'lubridate' package
ehours	Deprecated function in 'lubridate' package
emicroseconds	Deprecated function in 'lubridate' package
emilliseconds	Deprecated function in 'lubridate' package
eminutes	Deprecated function in 'lubridate' package
enanoseconds	Deprecated function in 'lubridate' package
epicoseconds	Deprecated function in 'lubridate' package
eseconds	Deprecated function in 'lubridate' package
eweeks	Deprecated function in 'lubridate' package
eyears	Deprecated function in 'lubridate' package

-- 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, floor and ceiling methods for date-time objects.
force_tz	Replace time zone to create new date-time

-- G --

guess_formats

Guess formats from the supplied date-time character vector.

-- H --

here	Deprecated function in 'lubridate' package
hm	Create a period with the specified hours, minutes, and seconds
hms	Create a period with the specified hours, minutes, and seconds
hour	Get/set hours component of a date-time.
hour<-	Get/set hours component of a date-time.
hours	Quickly create period objects.

-- I --

instant	Is x a date-time object?
instants	Is x a date-time object?
interval	Utilities for creation and manipulation of 'Interval' objects.
Interval-class	Interval class
int_aligns	Utilities for creation and manipulation of 'Interval' objects.
int_diff	Utilities for creation and manipulation of 'Interval' objects.
int_end	Utilities for creation and manipulation of 'Interval' objects.
int_end<-	Utilities for creation and manipulation of 'Interval' objects.
int_flip	Utilities for creation and manipulation of 'Interval' objects.
int_length	Utilities for creation and manipulation of 'Interval' objects.
int_overlaps	Utilities for creation and manipulation of 'Interval' objects.
int_shift	Utilities for creation and manipulation of 'Interval' objects.
int_standardize	Utilities for creation and manipulation of 'Interval' objects.
int_start	Utilities for creation and manipulation of 'Interval' objects.
int_start<-	Utilities for creation and manipulation of 'Interval' objects.
is.Date	Is x a Date object?
is.difftime	Is x a difftime object?
is.duration	Create a duration object.
is.instant	Is x a date-time object?
is.interval	Utilities for creation and manipulation of 'Interval' objects.
is.period	Create 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.
isoyear	Get/set years 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

-- 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_date	Efficient creation of date-times from numeric representations
make_datetime	Efficient creation of date-times from numeric representations
make_difftime	Create a difftime object.
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 period objects.
milliseconds	Quickly create period objects.
minute	Get/set minutes component of a date-time.
minute<-	Get/set minutes component of a date-time.
minutes	Quickly create period objects.
month	Get/set months component of a date-time.
month<-	Get/set months component of a date-time.
months.numeric	Quickly create period objects.
ms	Create a period with the specified hours, 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 period objects.
new_difftime	Deprecated function in 'lubridate' package
new_duration	Deprecated function in 'lubridate' package
new_interval	Deprecated function in 'lubridate' package
new_period	Deprecated function in 'lubridate' package
now	The current time

-- O --

olson_time_zones	Deprecated function in 'lubridate' package
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	Contrive a period to/from a given number of seconds.
picoseconds	Quickly create period objects.
pm	Does date time occur in the am or pm?
pretty_dates	Computes attractive axis breaks for date-time data

-- Q --

qday	Get/set days component of a date-time.
qday<-	Get/set days component of a date-time.
quarter	Get the fiscal quarter and semester of a date-time.
quick_durations	Quickly create duration objects.
quick_periods	Quickly create period objects.

-- R --

rollback	Roll back date to last day of previous month
round_date	Round, floor and ceiling methods for date-time objects.

-- S --

second	Get/set seconds component of a date-time.
second<-	Get/set seconds component of a date-time.
seconds	Quickly create period objects.
seconds_to_period	Contrive a period to/from a given number of seconds.
semester	Get the fiscal quarter and semester of a date-time.
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.

-- T --

timespan	Description of time span classes in lubridate.
Timespan-class	Timespan class
timespans	Description of time span classes in lubridate.
time_length	Compute the exact length of a time span.
time_length-method	Compute the exact length of a time span.
today	The current date
tz	Get/set time zone component of a date-time.
tz<-	Get/set time zone component of a date-time.

-- U --

update.POSIXt

Changes the components of a date object

-- W --

wday	Get/set days component of a date-time.
wday<-	Get/set days component of a date-time.
week	Get/set weeks component of a date-time.
week<-	Get/set weeks component of a date-time.
weeks	Quickly create period objects.
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<-	Get/set years component of a date-time.
years	Quickly create period objects.
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.
yq	Parse dates according to the order in that year, month, and day elements appear in the input vector.

-- misc --

%--%	Utilities for creation and manipulation of 'Interval' objects.
%/%-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	Timespan class