gstools.tools.exp_int¶

gstools.tools.exp_int(s, x)[source]¶

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