Expand the set of unique group levels of one grouping variables in a table containing all combinations of one or more grouping variables.
Usage
add_forced_group_levels(combos_all, forced_group_levels)
Arguments
- combos_all
A data.table containing all combinations of group levels found in the analysis data.
- forced_group_levels
A one column data.table containing a required set of group levels of a grouping variable.
Value
A data.table containing all combinations of group levels exapnded with the forced grouping levels.
