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Unpack R formula

Source: R/lmm_helpers.R
unpack_formula.Rd

Get the terms for the (fixed) effect for the given formula. Wors for lme4 as well as regular lm style formulas.

Usage

unpack_formula(formula, df, return_X = FALSE)

Arguments

formula

A formula object, for example specifying a LME model.

df

A data.frame, for example the first element in the list output of imp2list.

return_X

Logical. Whether to return the whole design matrix or just the (fixed) term names.

Value

A design matrix or a character vector of (fixed) term names.

Author

Serena Defina, 2026.