test_pairwise.py 文件源码

def test_rbf_kernel():
    rng = np.random.RandomState(0)
    X = rng.random_sample((5, 4))
    K = rbf_kernel(X, X)
    # the diagonal elements of a rbf kernel are 1
    assert_array_almost_equal(K.flat[::6], np.ones(5))