Loadable Function: z = gsl_sf_psi (arg1)

Loadable Function: [z, err] = gsl_sf_psi (…)

Computes the digamma function \psi(x) for general x, x \ne 0.

err contains an estimate of the absolute error in the value z.

This function is from the GNU Scientific Library, see http://www.gnu.org/software/gsl/ for documentation.

Package: gsl