| na.stinterp | Replace NAs by Stineman interpolation |
| na.stinterp.default | Replace NAs by Stineman interpolation |
| parabolaSlopes | Estimate the slope of an interpolating function using a parabola |
| stinemanSlopes | Estimate the slope of an interpolating function using an arc |
| stinterp | A consistently well behaved method of interpolation |