| anyNAdeclared | Labelled vectors with declared missing values |
| anyNAempty | Test the presence of empty (undeclared) missing values |
| as.declared | Labelled vectors with declared missing values |
| as.haven | Coerce to haven / labelled objects |
| declared | Labelled vectors with declared missing values |
| drop_na | Drop information / undeclare labelled objects |
| drop_undeclare | Drop information / undeclare labelled objects |
| is.declared | Labelled vectors with declared missing values |
| is.empty | Test the presence of empty (undeclared) missing values |
| label | Get / Declare value labels |
| label<- | Get / Declare value labels |
| labels | Get / Declare value labels |
| labels<- | Get / Declare value labels |
| measurement | Get / Set measurement levels for declared objects |
| measurement<- | Get / Set measurement levels for declared objects |
| missing_range | Get / Declare missing values |
| missing_range<- | Get / Declare missing values |
| missing_values | Get / Declare missing values |
| missing_values<- | Get / Declare missing values |
| undeclare | Drop information / undeclare labelled objects |
| weighted | Compute weighted summaries for declared objects |
| wfivenum | Compute weighted summaries for declared objects |
| wIQR | Compute weighted summaries for declared objects |
| wmean | Compute weighted summaries for declared objects |
| wmedian | Compute weighted summaries for declared objects |
| wmode | Compute weighted summaries for declared objects |
| wquantile | Compute weighted summaries for declared objects |
| wsd | Compute weighted summaries for declared objects |
| wstandardize | Compute weighted summaries for declared objects |
| wsummary | Compute weighted summaries for declared objects |
| wtable | Compute weighted summaries for declared objects |
| wvar | Compute weighted summaries for declared objects |