format_age_year: Create consistent, complete single-year age groups
In johnrbryant/demprep: Prepare Demographic Data

Description Usage Arguments Details Value See Also Examples

Given a vector of age group labels, create a factor that contains levels for all ages between break_min and break_max. The labels may include an "open" age group with no upper limit. Apart from the open age group, all the age groups have a width of one year.

1	format_age_year(x, break_min = 0, break_max = 100, open_last = TRUE)

`x`	A vector of age group labels.
`break_min`	An integer or `NULL`. Defaults to 0.
`break_max`	An integer or `NULL`. Defaults to 100.
`open_last`	Whether the final age group has no upper limit. Defaults to `TRUE`.

Even when an age group between break_min and break_max is not included in x, format_age_year still creates a level for it.

x must consist of labels for single-year age groups, such as "22", or open age groups, such as "100+". x must not contain labels for multi-year age groups such as "20-24".

If break_min or break_max is set to NULL, rather than to a specific value, then format_age_year finds the narrowest range that accommodates the data.

All age groups in x must be single-year age groups, except for any open age groups.

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

A factor with the same length as x.

Other functions for reformating age group labels are

format_age_multi
format_age_lifetab
format_age_births
format_age_custom
format_age_quarter
format_age_month

date_to_age_year creates one-year age groups from dates.

format_age_year(x = c("10", "3", "100+", "77"))

## allow 'break_min' and 'break_max' to be
## determined by the data
format_age_year(x = c(22, 7, 30),
                break_min = NULL,
                break_max = NULL)

## allow 'break_max' to be determined
## by the data, which includes an
## open age group
format_age_year(x = c("17", "10+"),
                break_max = NULL)

## oldest age group is closed
format_age_year(x = c(10, 3, 77),
                open_last = FALSE)