def test_view_of_view(matrix_type, subset_func, subset_func2):
    adata = gen_adata((30, 15), X_type=matrix_type)
    adata.raw = adata
    if subset_func is single_subset:
        pytest.xfail("Other subset generating functions have trouble with this")
    var_s1 = subset_func(adata.var_names, min_size=4)
    var_view1 = adata[:, var_s1]
    var_s2 = subset_func2(var_view1.var_names)
    var_view2 = var_view1[:, var_s2]
    assert var_view2._adata_ref is adata
    obs_s1 = subset_func(adata.obs_names, min_size=4)
    obs_view1 = adata[obs_s1, :]
    obs_s2 = subset_func2(obs_view1.obs_names)
    assert adata[obs_s1, :][:, var_s1][obs_s2, :]._adata_ref is adata

    view_of_actual_copy = adata[:, var_s1].copy()[obs_s1, :].copy()[:, var_s2].copy()

    view_of_view_copy = adata[:, var_s1][obs_s1, :][:, var_s2].copy()

    assert_equal(view_of_actual_copy, view_of_view_copy, exact=True)
def ldlq(bch):
    """creates the surface plots of a BCH reader object
    with a ld-lq identification"""
    beta = bch.ldq['beta']
    i1 = bch.ldq['i1']
    torque = bch.ldq['torque']
    ld = np.array(bch.ldq['ld'])
    lq = np.array(bch.ldq['lq'])
    psid = bch.ldq['psid']
    psiq = bch.ldq['psiq']

    rows = 3
    fig = plt.figure(figsize=(10, 4*rows))
    fig.suptitle('Ld-Lq Identification {}'.format(bch.filename), fontsize=16)
    fig.add_subplot(rows, 2, 1, projection='3d')
    i1beta_torque(i1, beta, torque)

    fig.add_subplot(rows, 2, 2, projection='3d')
    i1beta_psid(i1, beta, psid)

    fig.add_subplot(rows, 2, 3, projection='3d')
    i1beta_psiq(i1, beta, psiq)

    fig.add_subplot(rows, 2, 4, projection='3d')
    try:
        i1beta_psim(i1, beta, bch.ldq['psim'])
    except:
        i1beta_up(i1, beta, bch.ldq['up'])

    fig.add_subplot(rows, 2, 5, projection='3d')
    i1beta_ld(i1, beta, ld)

    fig.add_subplot(rows, 2, 6, projection='3d')
    i1beta_lq(i1, beta, lq)