base (version 3.1.1)

weekdays: Extract Parts of a POSIXt or Date Object

Description

Extract the weekday, month or quarter, or the Julian time (days since some origin). These are generic functions: the methods for the internal date-time classes are documented here.

Usage

weekdays(x, abbreviate)
"weekdays"(x, abbreviate = FALSE)
"weekdays"(x, abbreviate = FALSE)
months(x, abbreviate)
"months"(x, abbreviate = FALSE)
"months"(x, abbreviate = FALSE)
quarters(x, abbreviate)
"quarters"(x, ...)
"quarters"(x, ...)
julian(x, ...)
"julian"(x, origin = as.POSIXct("1970-01-01", tz = "GMT"), ...)
"julian"(x, origin = as.Date("1970-01-01"), ...)

Arguments

x

an object inheriting from class "POSIXt" or "Date".

abbreviate

logical. Should the names be abbreviated?

origin

an length-one object inheriting from class "POSIXt" or "Date".

...

arguments for other methods.

Value

weekdays and months return a character vector of names in the locale in use.quarters returns a character vector of "Q1" to "Q4".julian returns the number of days (possibly fractional) since the origin, with the origin as a "origin" attribute. All time calculations in R are done ignoring leap-seconds.

See Also

DateTimeClasses, Date