dot-process_factor_col function

Process factor column

This is usually the first thing to be processed in a formula like varname ~ x; ensures that varname is treated as a factor vector

.process_factor_col(cur_expr, params, env, verbose)

Arguments

• cur_expr: Current expression, see .make_parameters()
• params: Parameter accumulator
• env: Environment for the formula, on the first recursion this will be pulled from formula and then passed to subsequent recursions. Needed to check whether a function is actually a function.
• verbose: Logical, default TRUE, whether to show drop_trends warning if used incorrectly

Returns

Parameter list with factor_col updated