Get Implicit Null Categories

Get categories with implicit values for each selected columns

Usage

get_implicit_col(dt, years, cols, refs)

Arguments

dt

Dataset consisting all years

years

All years in the dataset

cols

Columns to be controlled for implicit null

refs

Reference values for the selected columns

See also

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