| E01DAF | Interpolating functions, fitting bicubic spline, data on rectangular grid |
| E02DAF | Least-squares surface fit, bicubic splines |
| E02DCF | Least-squares surface fit by bicubic splines with automatic knot placement, data on rectangular grid |
| E02DDF | Least-squares surface fit by bicubic splines with automatic knot placement, scattered data |
| E02DEF | Evaluation of fitted bicubic spline at a vector of points |
| E02DFF | Evaluation of fitted bicubic spline at a mesh of points |
| E02ZAF | Sort two-dimensional data into panels for fitting bicubic splines |