Identify an Age Variable

Find the element of nms that looks like an age variable. If no elements look like an age variable, or if two or more elements do, then return NULL.

Usage

find_var_age(nms)

Arguments

nms

A character vector

Value

An element of nms, or NULL.

See also

find_var_time(), find_var_sexgender()

Examples

find_var_age(c("Sex", "Year", "AgeGroup", NA)) ## one valid
#> [1] "AgeGroup"
find_var_age(c("Sex", "Year"))                 ## none valid
#> NULL
find_var_age(c("age", "age.years"))            ## two valid
#> NULL