Quarters divide the year into fourths. Semesters divide the year into halfs.
quarter(
x,
type = "quarter",
fiscal_start = 1,
with_year = identical(type, "year.quarter")
)
semester(x, with_year = FALSE)a date-time object of class POSIXct, POSIXlt, Date, chron, yearmon, yearqtr, zoo, zooreg, timeDate, xts, its, ti, jul, timeSeries, fts or anything else that can be converted with as.POSIXlt
the format to be returned for the quarter. Can be one one of "quarter" - return numeric quarter (default), "year.quarter" return the ending year and quarter as a number of the form year.quarter, "date_first" or "date_last" - return the date at the quarter's start or end, "year_start/end" - return a full description of the quarter as a string which includes the start and end of the year (ex. "2020/21 Q1").
numeric indicating the starting month of a fiscal year.
logical indicating whether or not to include the quarter or
semester's year (deprecated; use the type parameter instead).
numeric or a vector of class POSIXct if type argument is date_first or
date_last. When type is year.quarter the year returned is the end year of the
financial year.
x <- ymd(c("2012-03-26", "2012-05-04", "2012-09-23", "2012-12-31"))
quarter(x)
#> [1] 1 2 3 4
quarter(x, type = "year.quarter")
#> [1] 2012.1 2012.2 2012.3 2012.4
quarter(x, type = "year.quarter", fiscal_start = 11)
#> [1] 2012.2 2012.3 2012.4 2013.1
quarter(x, type = "date_first", fiscal_start = 11)
#> [1] "2012-02-01" "2012-05-01" "2012-08-01" "2012-11-01"
quarter(x, type = "date_last", fiscal_start = 11)
#> [1] "2012-04-30" "2012-07-31" "2012-10-31" "2013-01-31"
semester(x)
#> [1] 1 1 2 2
semester(x, with_year = TRUE)
#> [1] 2012.1 2012.1 2012.2 2012.2