functionpsi
Psi or digamma function: d(gamma)/dx/gamma
Extends from TRANSFORM.Icons.Function (Icon for functions).
Information
Implementation of the psi or digamma function. See also scipy.special.psi or scipy.special.digamma
Source:
- http://scipp.ucsc.edu/~haber/ph116A/psifun_11.pdf
- NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY, NIST handbook of mathematical functions, F. W. J. Olver et al., Eds., Cambridge University Press, Cambridge New York Melbourne (2010).
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real | x | Input value | |
| Integer | nk | 10 | Number of summations |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real | psi | psi function value |