dot-switch_reference_if_needed function

Check if reference switching is necessary

Check if the contrast matrix is able to switch reference levels, and if it is requested, do so

.switch_reference_if_needed(
  contrast_matrix,
  new_reference_label = NA,
  new_reference_index
)

Arguments

• contrast_matrix: Contrast matrix
• new_reference_label: Name of the level to use
• new_reference_index: Index of the level to use

Returns

Contrast matrix with reference level swapped if needed