derive_vars_aage.md
In admiral: ADaM in R Asset Library

derive_var_age_years Test 6: Error is issued if age_unit is missing

Code
  derive_var_age_years(input, AGE, new_var = AAGE)
Condition
  Error in `derive_var_age_years()`:
  ! There is no unit variable (`AGEU`) associated with `AGE`. Please specify a value for `age_unit`.

derive_var_age_years Test 7: warn if `age_unit` doesn't match units in data

Code
  derive_var_age_years(input, AGE, age_unit = "months", new_var = AAGE)
Condition
  Warning:
  The unit variable `AGEU` is associated with `AGE` and contains multiple values but the argument `age_unit` has been specified with a single different value. The `age_unit` argument is ignored and the conversion will be based on `AGEU`.
Output
  # A tibble: 5 x 3
      AGE AGEU    AAGE
    <dbl> <chr>  <dbl>
  1    25 years   25  
  2   312 months  26  
  3    51 years   51  
  4   402 months  33.5
  5   432 months  36

derive_var_age_years Test 10: warn if unit in data differs from `age_unit`

Code
  derive_var_age_years(input, AGE, age_unit = "years", new_var = AAGE)
Condition
  Warning:
  The unit variable `AGEU` is associated with `AGE` but the argument `age_unit` has been specified with a different value. The `age_unit` argument is ignored and the conversion will be based on `AGEU`.
Output
  # A tibble: 5 x 3
      AGE AGEU    AAGE
    <dbl> <chr>  <dbl>
  1   459 months  38.2
  2   312 months  26  
  3   510 months  42.5
  4   402 months  33.5
  5   432 months  36