| E02DDF | Least squares surface fit by bicubic splines with automatic knot placement, scattered data |
| E02JDF | Spline approximation to a set of scattered data using a two-stage approximation method |
| E02JEF | Evaluation at a vector of points of a spline computed by E02JDF |
| E02JFF | Evaluation at a mesh of points of a spline computed by E02JDF |