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

day {lubridate} | R Documentation

## Get/set days component of a date-time

### Description

Get/set days component of a date-time

### Usage

    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

    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

[Package lubridate version 1.7.4 Index]