| e04fcc | Unconstrained nonlinear least squares (no derivatives required) |
| e04gbc | Unconstrained nonlinear least squares (first derivatives required) |
| g02btc | Update a weighted sum of squares matrix with a new observation |
| g02buc | Computes a weighted sum of squares matrix |
| g02bwc | Computes a correlation matrix from a sum of squares matrix |
| g02eac | Computes residual sums of squares for all possible linear regressions for a set of independent variables |
| g02ecc | Calculates R2 and CP values from residual sums of squares |