| e01dac | Interpolating function, bicubic spline interpolant, two variables |
| e02dac | Least-squares surface fit, bicubic splines |
| e02dcc | Least-squares bicubic spline fit with automatic knot placement, two variables (rectangular grid) |
| e02ddc | Least-squares bicubic spline fit with automatic knot placement, two variables (scattered data) |
| e02dec | Evaluation of bicubic spline, at a set of points |
| e02dfc | Evaluation of bicubic spline, at a mesh of points |
| e02zac | Sort two-dimensional data into panels for fitting bicubic splines |