ect of class "split_df", usually, a result of a call to split_df().</p></dd>


<dt>...</dt>
<dd><p>one or more unquoted expressions separated by commas.
Select the categorical variable you want to compare.
You can treat variable names like they are positions.
Positive values select variables; negative values to drop variables.
If the first expression is negative, compare_target_category() will automatically
start with all variables.
These arguments are automatically quoted and evaluated in a context where c