Create variable aldersklasse from alder.
utlede_aldersklasse(df)ablanor data.frame, must contain variable alder. See also
utlede_alder.
Returns df with one new variable: aldersklasse
x <- data.frame(alder = 73:76)
ablanor::utlede_aldersklasse(x)
#> alder aldersklasse
#> 1 73 70-79
#> 2 74 70-79
#> 3 75 70-79
#> 4 76 70-79