Creates a list of lookup tables for attribute level occurrence.
lvl_occurrences(utility, rows, level_balance)
A named list of utility functions. See the examples and the vignette for examples of how to define these correctly for different types of experimental designs.
An integer giving the number of rows in the final design
Boolean equal to TRUE if level balance. This is not used
A list the length of the expanced attribute levels. Each list element is a lookup table where the names of the table is the attribute level and the element the number of times the minimum number of times the level occurs.