| E02ACF | Minimax curve fit by polynomials |
| E02ADF | Least-squares curve fit, by polynomials, arbitrary data points |
| E02AFF | Least-squares polynomial fit, special data points (including interpolation) |
| E02AGF | Least-squares polynomial fit, values and derivatives may be constrained, arbitrary data points |
| E02BAF | Least-squares curve cubic spline fit (including interpolation) |
| E02BEF | Least-squares cubic spline curve fit, automatic knot placement |
| E02CAF | Least-squares surface fit by polynomials, data on lines |
| 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 |
| G08CGF | Performs the χ2 goodness of fit test, for standard continuous distributions |
| G10ABF | Fit cubic smoothing spline, smoothing parameter given |
| G10ACF | Fit cubic smoothing spline, smoothing parameter estimated |