| e02agc | Least-squares polynomial fit, values and derivatives may be constrained, arbitrary data points |
| e02bac | Least-squares curve cubic spline fit (including interpolation), one variable |
| e02bec | Least-squares cubic spline curve fit, automatic knot placement, one variable |
| e02cac | Least-squares surface fit by polynomials, data on lines |
| 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) |
| g08cgc | Performs the χ2 goodness of fit test, for standard continuous distributions |
| g10abc | Fit cubic smoothing spline, smoothing parameter given |
| g10acc | Fit cubic smoothing spline, smoothing parameter estimated |