day: Get/set days component of a date-time

Description Usage Arguments Details Value See Also Examples

View source: R/accessors-day.r

Description

Get/set days component of a date-time

Usage

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day(x)

mday(x)

wday(x, label = FALSE, abbr = TRUE,
  week_start = getOption("lubridate.week.start", 7),
  locale = Sys.getlocale("LC_TIME"))

qday(x)

yday(x)

day(x) <- value

mday(x) <- value

qday(x) <- value

wday(x, week_start = getOption("lubridate.week.start", 7)) <- value

yday(x) <- value

Arguments

x

a POSIXct, POSIXlt, Date, chron, yearmon, yearqtr, zoo, zooreg, timeDate, xts, its, ti, jul, timeSeries, or fts object.

label

logical. Only available for wday. TRUE will display the day of the week as an ordered factor of character strings, such as "Sunday." FALSE will display the day of the week as a number.

abbr

logical. Only available for wday. FALSE will display the day of the week as an ordered factor of character strings, such as "Sunday." TRUE will display an abbreviated version of the label, such as "Sun". abbr is disregarded if label = FALSE.

week_start

day on which week starts following ISO conventions - 1 means Monday, 7 means Sunday (default). You can set lubridate.week.start option to control this parameter globally.

locale

locale to use for day names. Default to current locale.

value

a numeric object

Details

day() and day<-() are aliases for mday() and mday<-() respectively.

Value

wday() returns the day of the week as a decimal number or an ordered factor if label is TRUE.

See Also

yday(), mday()

Examples

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x <- as.Date("2009-09-02")
wday(x) #4

wday(ymd(080101))
wday(ymd(080101), label = TRUE, abbr = FALSE)
wday(ymd(080101), label = TRUE, abbr = TRUE)
wday(ymd(080101) + days(-2:4), label = TRUE, abbr = TRUE)

x <- as.Date("2009-09-02")
yday(x) #245
mday(x) #2
yday(x) <- 1  #"2009-01-01"
yday(x) <- 366 #"2010-01-01"
mday(x) > 3

lubridate documentation built on Nov. 17, 2017, 6:56 a.m.