parse_pffr_formula: Parse a pffr-style formula
Description
Extract term types and variable names from a pffr formula using
`terms.formula()` with specials.
Usage
parse_pffr_formula(formula)
Value
A list with components:
- response
Character string of the response variable name.
- terms
A list of parsed terms, each with `type`, `varname`, and `call`.
Arguments
- formula
A formula object with pffr-style terms.