Substitute the '+' function for the '|' 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 | 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.