Extract all missing/jump codes from metadata and export a cause-label-data-frame
prep_extract_cause_label_df(meta_data = "item_level", label_col = VAR_NAMES)
list with the entries
meta_data
data.frame a data frame that contains updated metadata
cause_label_df
data.frame missing code table. If missing codes have
labels the respective data frame are
specified here, see cause_label_df
data.frame the data frame that contains metadata attributes of study data
variable attribute the name of the column in the metadata with labels of variables
prep_add_cause_label_df