OpenTURNS

An Open source initiative for the Treatment of Uncertainties, Risks'N Statistics

DiGamma¶

DiGamma(*args)¶

Digamma function.

$\Psi(x) = \frac{1}{\Gamma(x)}\frac{\mathrm{d} \Gamma(x)}{\mathrm{d}x}$

with $\Gamma$ the Gamma function.

Parameters:

xfloat $\in \Rset^*_+$ or complex $\in \Cset \setminus \Rset_-$

Returns:

resultfloat or complex

See also

openturns.SpecFunc.Gamma