The variables specified by the by_vars argument are expected to be in the dataset.
Default value
none
by_vars
Grouping variables
Defines groups of records in which to look for duplicates.
If omitted, all variables in the input dataset are used in the by group.
Note: Omitting by_vars will increase the function's run-time, so it is
recommended to specify the necessary grouping variables for large datasets
whenever possible.
Permitted values
list of variables created by exprs(), e.g., exprs(USUBJID, VISIT)
Default value
NULL
See Also
Other internal:
admiral-package,
format.basket_select(),
signal_duplicate_records()