| age.income | Age/income data | 
| bpd | Bronchopulmonary dysplasia data | 
| calif.air.poll | California air polution data | 
| copper | Copper data | 
| elec.temp | Electricity usage and temperature data | 
| ethanol | Ethanol data | 
| fitted.spm | Fitted values for semiparametric regression. | 
| fossil | Fossil data | 
| fuel.frame | Automobile data from consumer reports | 
| janka | Janka hardness data | 
| lidar | LIDAR data | 
| lines.spm | Add a curves to an existing plot. | 
| milan.mort | Milan mortality data | 
| monitor.mercury | Mercury biomonintoring data | 
| onions | Onions data | 
| pig.weights | Pig weight data | 
| plot.spm | Semiparametric regression plotting | 
| predict.spm | Semiparametric regression prediction. | 
| print.spm | Prints semiparametric regression fit object. | 
| ragweed | Ragweed data | 
| residuals.spm | Residuals for semiparametric regression. | 
| retire.plan | Retirement plan data | 
| salinity | Salinity data | 
| sausage | Sausage data | 
| scallop | Scallop abundance data | 
| sitka | Sitka spruce data | 
| spm | Fit a SemiParametric regression Model | 
| summary.spm | Semiparametric regression summary | 
| term.structure | Term structure data | 
| trade.union | Trade union data | 
| ustemp | U.S. temperature data |