Assert canonical subject-ID columns are declared in id_cols.

If a canonical subject-ID column (USUBJID or SUBJID) is present in the data, it must be listed in id_cols so it is regenerated as a synthetic ID rather than value-sampled (which would leak real subject identifiers).

Usage

.assert_required_id_cols(data, id_cols, dataset_name)

Arguments

data

data.frame - the real ADaM dataset being glimpsed.

id_cols

character - declared ID columns.

dataset_name

character - name of the data object for error message.

Value

NULL if assertion passes, otherwise throws an error.