"Substitute bars"

Substitute the '+' function for the '|' and '||' function in a mixed-model formula. This provides a formula suitable for the current model.frame function.

Usage

subbars(term)

Arguments

term

a mixed-model formula

Value

the formula with all | and || operators replaced by +

Note

This function is called recursively on individual terms in the model, which is why the argument is called term and not a name like form, indicating a formula.

See also

formula, model.frame, model.matrix.

Other utilities: expandDoubleVerts(), mkReTrms(), nobars()

Examples

subbars(Reaction ~ Days + (Days|Subject)) ## => Reaction ~ Days + (Days + Subject)
#> Reaction ~ Days + (Days + Subject)
#> <environment: 0x55db6eaeceb0>