slice_derivation.md
In admiral: ADaM in R Asset Library

slice_derivation Test 7: Error if a mandatory argument is not in arg or all slices

Code
  actual <- slice_derivation(advs, derivation = derive_vars_dtm, args = params(
    dtc = VSDTC), derivation_slice(filter = str_detect(VSTPT, "PRE|BEFORE"),
  args = params(time_imputation = "first", new_vars_prefix = "A")),
  derivation_slice(filter = TRUE, args = params(time_imputation = "last")))
Condition
  Error in `slice_derivation()`:
  ! Issue with the mandatory argument `new_vars_prefix` of derivation function `derive_vars_dtm`. It must: (1) be passed to the `args` argument, or (2) be passed to all derivation slices.