| e01aec | Interpolating functions, polynomial interpolant, data may include derivative values, one variable |
| e01bac | Interpolating function, cubic spline interpolant, one variable |
| e01bec | Interpolating function, monotonicity-preserving, piecewise cubic Hermite, one variable |
| e01dac | Interpolating function, bicubic spline interpolant, two variables |
| e01rac | Interpolating functions, rational interpolant, one variable |