Declare or inspect design roles

roles() has two Phase 1.F uses. With named string arguments it constructs a declared-role object, e.g. roles(subject = "sampled_unit"). With a compiled spec or fit as its only unnamed argument, it returns the observed role fallback inferred from the formula and model frame.

Usage

roles(...)

Arguments

...

Either named role strings or one unnamed mm_spec / mm_fit.

Value

An mm_roles object with a data-frame table.