def test_negative(self):
X = np.array([[1, 2], [-0.1, -2]])
with npt.assert_raises(ValueError):
CA(X, None, None)
def setup(self):
"""Data from table 9.11 in Legendre & Legendre 1998."""
self.X = np.loadtxt(get_data_path('L&L_CA_data'))
self.ordination = CA(self.X, ['Site1', 'Site2', 'Site3'],
['Species1', 'Species2', 'Species3'])
