def test_detrend_mean_dataframe(self):
x = DataFrame(np.random.randn(3, 4))
dtx = detrend_mean(x)
m = dtx.mean()
eps = np.finfo(float).eps
assert_allclose(m.values.squeeze(), np.zeros(m.shape),
atol=eps)
def test_detrend_mean(self):
x = np.random.randn(3, 2)
dtx = detrend_mean(x)
expect = x - x.mean(0)
self.assertEqual(expect.dtype, dtx.dtype)
assert_array_equal(dtx, expect)
assert_allclose(dtx.mean(), 0.0, atol=np.finfo(dtx.dtype).eps)
