gstools.tools.exp_int

gstools.tools.exp_int(s, x)

Calculate the exponential integral \(E_s(x)\).

Given by: \(E_s(x) = \int_1^\infty \frac{e^{-xt}}{t^s}\,\mathrm dt\)

Parameters:

• s (float) – exponent in the integral (should be > -100)

• x (numpy.ndarray) – input values