One Against All Contrast — one_against_all_contrast • fmrireg

Construct contrasts comparing each factor level against the average of the other levels.

Usage

one_against_all_contrast(levels, facname, where = NULL)

Arguments

levels: A vector of factor levels to be compared.
facname: A character string specifying the name of the factor containing the supplied levels.
where: An optional formula specifying the subset over which the contrast is computed.

Value

A contrast_set object containing contrasts comparing each factor level against the average of the other levels.

Examples

fac <- factor(rep(c("A", "B", "C"), 2))
con <- one_against_all_contrast(levels(fac), "fac")