test_svd.py 文件源码

def test_inverse_transform():
    # We need a lot of components for the reconstruction to be "almost
    # equal" in all positions. XXX Test means or sums instead?
    a = dd.TruncatedSVD(n_components=52, random_state=42, n_iter=5)
    b = sd.TruncatedSVD(n_components=52, random_state=42)
    b.fit(Xdense)
    Xt = a.fit_transform(dXdense)
    Xinv = a.inverse_transform(Xt)
    assert_array_almost_equal(Xinv.compute(), Xdense, decimal=1)