flag bad controls (mediator/collider/desc of Y) among a candidate set — bad_controls_in • DAGassist

flag bad controls (mediator/collider/desc of Y) among a candidate set

Usage

bad_controls_in(dag, controls, exposure, outcome)

Arguments

dag: A dagitty DAG object.
controls: Character vector of variable names.
exposure: Character; exposure node name (X).
outcome: Character; outcome node name (Y).

Value

A character vector (possibly empty) containing the elements of controls that are identified as "bad controls".

This is essentially the inverse of pick_minimal_controls(), as it returns bad controls, rather than the minimal/canonical set of good controls

Examples

# Which variables in a formula are bad controls, given the DAG?
bad_controls_in(toy_dag, controls = c("M", "C", "Z"))
#> [1] "M" "C"