format_period_custom: Create consistent, complete customised periods
In johnrbryant/demprep: Prepare Demographic Data

Description Usage Arguments Details Value See Also Examples

Given a vector of period labels, create a factor that contains levels for all periods defined by breaks. format_period_custom is the most flexible of the format_period functions in that the periods can have any combination of widths.

1	format_period_custom(x, breaks, month_start = "Jan", label_year_start = TRUE)

`x`	A vector of period labels.
`breaks`	A vector of strictly increasing integer values.
`month_start`	An element of `month.name`, or `month.abb`. Periods start on the first day of this month.
`label_year_start`	Logical. Whether to label a period by the calendar year at the beginning of the period or the calendar year at the end. Defaults to `TRUE`.

The elements of x can be single-year labels such as "2000" and "1975", multi-year labels such as "1950-1960" and "2020-2025", or a mixture of the two. x cannot contain open intervals such as "<2020".

If x contains NA, then the levels of the factor created by format_period_custom also contain NA.

A factor with the same length as x.

Other functions for reformating period labels are

format_period_year
format_period_multi
format_period_quarter
format_period_month

date_to_period_year creates periods from dates.

format_period_custom(x = c("2000-2001", "2004", "2005-2010", "1996-1998"),
                     breaks = c(1990, 2000, 2020))

format_period_custom(x = c("2000-2001", "2004", "2005-2010", "1996-1998"),
                     breaks = c(1995, 2005, 2010, 2020))