Skip to contents

Update Formula Addition Terms

Source: R/brmsformula.R
update_adterms.Rd

Update additions terms used in formulas of brms. See addition-terms for details.

Usage

update_adterms(formula, adform, action = c("update", "replace"))

Arguments

formula

Two-sided formula to be updated.

adform

One-sided formula containing addition terms to update formula with.

action

Indicates what should happen to the existing addition terms in formula. If "update" (the default), old addition terms that have no corresponding term in adform will be kept. If "replace", all old addition terms will be removed.

Value

An object of class formula.

Examples

form <- y | trials(size) ~ x
update_adterms(form, ~ trials(10))
#> y | trials(10) ~ x
#> <environment: 0x55c0e08951d8>
update_adterms(form, ~ weights(w))
#> y | trials(size) + weights(w) ~ x
#> <environment: 0x55c0e08951d8>
update_adterms(form, ~ weights(w), action = "replace")
#> y | weights(w) ~ x
#> <environment: 0x55c0e08951d8>
update_adterms(y ~ x, ~ trials(10))
#> y | trials(10) ~ x
#> <environment: 0x55c0e08951d8>