reformulas (random
effects formulas) is a utility package for processing
“lme4-style” random effects formulas in R (i.e., formulas
where the random effects are included in the form (f|g) as
components of an overall model formula, where f represents
a sub-formula for the varying effects and g represents a
sub-formula for the grouping variable(s).
The package contains functions like findbars (extract
terms containing |, i.e. random-effects terms),
nobars (drop terms containing bars from a formula), etc..
The goal of reformulas is to be used upstream of
lme4 and glmmTMB (and possibly other packages)
as a unified toolkit for processing formulas.