allot_units: Define allotment of units to nested units
Description
This function adds the edges between factor nodes to describe the
high-level relationship between factors.
This function does not actually assign edges between level nodes.
Usage
allot_units(.edibble, ..., .record = TRUE)
Value
Return an edibble design.
Arguments
.edibble
An edibble design which should have units, treatments and allotment defined.