| 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) |
| e02dhc | Evaluation of spline surface at mesh of points with derivatives |