check_formula_list: Ensure object is a (list of) formula(s)

In JointAI: Joint Analysis and Imputation of Incomplete Data

Ensure object is a (list of) formula(s)

Description

Check if an object is NULL, a formula, or a list of formulas and (optionally) convert it to a list of formulas. If the input is of unknown type or if it is a list that has entries that are neither formula nor NULL, an error is thrown.

Usage

check_formula_list(formula, convert = TRUE)

Arguments

formula	An object expected to be either a formula, a list of formulas, or NULL.
convert	Logical; if TRUE, a single formula is wrapped in a list.

Details

Internal function; used in many help functions, get_refs, *_imp, predict (2022-02-05)

Value

A named list of formula (and/or NULL) objects, or NULL. If convert is FALSE, a single formula is returned as-is.

JointAI documentation built on Jan. 30, 2026, 5:07 p.m.