def test_quantile(self): """Test quantile.""" lam = 1.5 skst = MvSN(ndim=1, lam=lam) arg = -2. cdf = skst.cdf(arg) ppf = skst.ppf(cdf) self.assertAlmostEqual(ppf, arg) arg = -.1 * np.ones(3) cdf = skst.cdf_vec(arg) quantiles = skst.ppf_vec(cdf) npt.assert_array_almost_equal(arg, quantiles)