def test_cum_irf_stderr(self):
        stderr = self.irf.cum_effect_stderr(orth=False)
        for i in range(1, 1 + len(self.lut.cum_irf_stderr)):
            assert_almost_equal(np.round(stderr[i], 3),
                                self.lut.cum_irf_stderr[1-i])
dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/tsa/vector_ar/tests/test_var.py/TestVARResultsLutkepohl.test_cum_irf_stderr/swapped operands of `-`