| 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 |
| e02dhc | Evaluation of spline surface at mesh of points with derivatives |
| e02zac | Sort two-dimensional data into panels for fitting bicubic splines |