| e01sjc | A function to generate a two-dimensional surface interpolating a set of data points, using the method of Renka and Cline |
| e02cac | Least squares surface fit by polynomials, data on lines parallel to one independent coordinate axis |
| e02dac | Least squares surface fit, bicubic splines |
| e02dhc | Evaluation of spline surface at mesh of points with derivatives |