Get missing codes from a coding

Takes a coding a returns a new coding with all codes that represent a missing value.

missing_codes(coding)

Arguments

coding

a coding

Value

A coding that contains all missing codes. If no codes are found, returns `empty_coding()`

Examples

missing_codes(coding(code("Yes", 1), code("No", 0), code("Missing", NA)))
#> <Coding>
#> # A tibble: 1 × 5
#>   link    label   value description missing
#>   <chr>   <chr>   <lgl> <chr>       <lgl>  
#> 1 Missing Missing NA    Missing     TRUE   
missing_codes(coding(code("Yes", 1), code("No", 0)))
#> <Empty Coding>