These tools extracting parts from formulae. The only function that extracts from the left-hand
side is frm_outcome. The rest only extract from the right-hand side. The word term is used to
denote functions that extract full terms from the formula, whereas var denotes functions that
extract the variables the formula uses. For example, the formula y ~ a * b + (1 | group) has
terms a, b, a:b, and 1 | group. The same formula has variables a, b, and group.
frm_outcome(frm)frm_terms(frm)
frm_interaction_terms(frm)
frm_fixed_terms(frm)
frm_random_terms(frm)
frm_vars(frm)
frm_random_vars(frm)
frm_fixed_vars(frm)
The function name and parameters should be descriptive enough (see Description above). The extracted parts are always strings.
The formula to extract values from
These tools are ONLY tested against models and formulae that are explicitly supported. See the README and test cases for more information.
formula_building formula_expansion