weekdays {base} | R Documentation |
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.
weekdays(x, abbreviate) ## S3 method for class 'POSIXt': weekdays(x, abbreviate = FALSE) ## S3 method for class 'Date': weekdays(x, abbreviate = FALSE) months(x, abbreviate) ## S3 method for class 'POSIXt': months(x, abbreviate = FALSE) ## S3 method for class 'Date': months(x, abbreviate = FALSE) quarters(x, abbreviate) ## S3 method for class 'POSIXt': quarters(x, ...) ## S3 method for class 'Date': quarters(x, ...) julian(x, ...) ## S3 method for class 'POSIXt': julian(x, origin = as.POSIXct("1970-01-01", tz="GMT"), ...) ## S3 method for class 'Date': julian(x, origin = as.Date("1970-01-01"), ...)
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. |
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.
Other components such as the day of the month or the year are
very easy to compute: just use as.POSIXlt
and extract
the relevant component.
weekdays(.leap.seconds) months(.leap.seconds) quarters(.leap.seconds)