| E01BAF | Interpolating functions, cubic spline interpolant, one variable |
| E01DAF | Interpolating functions, fitting bicubic spline, data on rectangular grid |
| E02BAF | Least squares curve cubic spline fit (including interpolation) |
| E02BBF | Evaluation of fitted cubic spline, function only |
| E02BCF | Evaluation of fitted cubic spline, function and derivatives |
| E02BDF | Evaluation of fitted cubic spline, definite integral |
| E02BEF | Least squares cubic spline curve fit, automatic knot placement |
| 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 |
| E02DHF | Evaluation of spline surface at mesh of points with derivatives |
| E02ZAF | Sort two-dimensional data into panels for fitting bicubic splines |
| G10ABF | Fit cubic smoothing spline, smoothing parameter given |
| G10ACF | Fit cubic smoothing spline, smoothing parameter estimated |