Loadable Function: z = gsl_sf_expint_E1 (arg1)

Loadable Function: [z, err] = gsl_sf_expint_E1 (…)

Computes the exponential integral E_1(x),

E_1(x) := Re \int_1^\infty dt \exp(-xt)/t.

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