code: def compute_K_analytical(self, spacing):
          
          K = redaK.compute_K_analytical(self.data, spacing=spacing)
          self.data = redaK.apply_K(self.data, K)
          redafixK.fix_sign_with_K(self.data)
docs: Compute geometrical factors over the homogeneous half-space with a
          constant electrode spacing