| D02UBF
| Function or low-order-derivative values on Chebyshev grid from coefficients of Chebyshev interpolating polynomial |
| D02UDF
| Differentiate a function by the FFT using function values on Chebyshev grid |
| E01BGF
| Interpolated values, interpolant computed by E01BEF, function and first derivative, one variable |
| E02AHF
| Derivative of fitted polynomial in Chebyshev series form |
| E02BCF
| Evaluation of fitted cubic spline, function and derivatives |
| E02BFF
| Evaluation of fitted cubic spline, function and optionally derivatives at a vector of points |