broom.helpers (version 1.17.0)

model_list_contrasts: List contrasts used by a model

Description

List contrasts used by a model

Usage

model_list_contrasts(model)
# S3 method for default
model_list_contrasts(model)

Value

A tibble with three columns:

• variable: variable name

• contrasts: contrasts used

• contrasts_type: type of contrasts ("treatment", "sum", "poly", "helmert", "sdiff, "other" or "no.contrast")

• reference: for variables with treatment, SAS or sum contrasts, position of the reference level

Arguments

model

(a model object, e.g. glm)
A model object.

Details

For models with no intercept, no contrasts will be applied to one of the categorical variable. In such case, one dummy term will be returned for each level of the categorical variable.

See Also

Other model_helpers: model_compute_terms_contributions(), model_get_assign(), model_get_coefficients_type(), model_get_contrasts(), model_get_model(), model_get_model_frame(), model_get_model_matrix(), model_get_n(), model_get_nlevels(), model_get_offset(), model_get_pairwise_contrasts(), model_get_response(), model_get_response_variable(), model_get_terms(), model_get_weights(), model_get_xlevels(), model_identify_variables(), model_list_higher_order_variables(), model_list_terms_levels(), model_list_variables()

Examples

glm(
  am ~ mpg + factor(cyl),
  data = mtcars,
  family = binomial,
  contrasts = list(`factor(cyl)` = contr.sum)
) |>
  model_list_contrasts()