NA-only variablesThis utility function identifies variables with NAs values only.
util_only_NAs(x)flagged binary vector
the variable to check a vector
util_correct_variable_use
Other robustness_functions:
util_as_valid_missing_codes(),
util_check_one_unique_value(),
util_correct_variable_use(),
util_empty(),
util_ensure_character(),
util_ensure_in(),
util_ensure_suggested(),
util_expect_scalar(),
util_fix_rstudio_bugs(),
util_is_integer(),
util_is_numeric_in(),
util_is_valid_missing_codes(),
util_match_arg(),
util_observations_in_subgroups(),
util_stop_if_not(),
util_warn_unordered()