| %+% | Utility functions to treat characters |
| %+%-methods | Utility functions to treat characters |
| %n% | Utility functions to treat characters |
| correlation | Bivariate correlations |
| cross | Crosstabs |
| freq | Frequencies |
| numtostr | Utility functions to treat characters |
| paste | Utility functions to treat characters |
| print.correlation | Bivariate correlations |
| print.cross | Crosstabs print methods |
| print.frequencies | Frequencies |
| Total | Crosstabulations using formula |
| xf | Methods that apply a function across a levels of one or more factors |
| xtab | Crosstabulations using formula |