Find Implicit Null Categories

Find implicit null categories for selected columns on every selected year

Usage

find_implicit_col(dt, years, col, ref)

Arguments

dt

Dataset consisting all years

years

All years in the dataset

col

Selected column to be controlled for implicit null

ref

Reference values for the selected column

See also

Other implicit-null functions: do_implicit_null(), find_implicit_null(), get_implicit_col(), get_implicit_per_year(), get_implicit_ref()