Methods for calculating (usually) accurate numerical first and second order derivatives. Accurate calculations are done using 'Richardson''s' extrapolation or, when applicable, a complex step derivative is available. A simple difference method is also provided. Simple difference is (usually) less accurate but is much quicker than 'Richardson''s' extrapolation and provides a useful cross-check. Methods are provided for real scalar and vector valued functions.
| Label | Latest Version |
|---|---|
| r-lang | 2016.8_1 |
| test | 2016.8_1 |
| r-essentials | 2016.8_1 |
| abs | 2016.8_1 |
| q2_fail | 2016.8_1 |
| abs-r | 2016.8_1 |
| abs-r2 | 2016.8_1 |
| ptf_2019_q3 | 2016.8_1 |
| main | 2016.8_1 |
