| e01bac | Interpolating function, cubic spline interpolant, one variable |
| e01dac | Interpolating function, bicubic spline interpolant, two variables |
| e02bac | Least-squares curve cubic spline fit (including interpolation), one variable |
| e02bbc | Evaluation of fitted cubic spline, function only |
| e02bcc | Evaluation of fitted cubic spline, function and derivatives |
| e02bdc | Evaluation of fitted cubic spline, definite integral |
| e02bec | Least-squares cubic spline curve fit, automatic knot placement, one variable |
| 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 |
| g10abc | Fit cubic smoothing spline, smoothing parameter given |
| g10acc | Fit cubic smoothing spline, smoothing parameter estimated |