def test_negative_scalar_index(adata, index: int, obs: bool):
    pos_index = index + (adata.n_obs if obs else adata.n_vars)

    if obs:
        adata_pos_subset = adata[pos_index]
        adata_neg_subset = adata[index]
    else:
        adata_pos_subset = adata[:, pos_index]
        adata_neg_subset = adata[:, index]

    np.testing.assert_array_equal(
        adata_pos_subset.obs_names, adata_neg_subset.obs_names
    )
    np.testing.assert_array_equal(
        adata_pos_subset.var_names, adata_neg_subset.var_names
    )
def psidq(bch):
    """creates the surface plots of a BCH reader object
    with a psid-psiq identification"""
    id = bch.psidq['id']
    iq = bch.psidq['iq']
    torque = bch.psidq['torque']
    ld = np.array(bch.psidq_ldq['ld'])
    lq = np.array(bch.psidq_ldq['lq'])
    psim = bch.psidq_ldq['psim']
    psid = bch.psidq['psid']
    psiq = bch.psidq['psiq']

    rows = 3
    fig = plt.figure(figsize=(10, 4*rows))
    fig.suptitle('Psid-Psiq Identification {}'.format(
        bch.filename), fontsize=16)

    fig.add_subplot(rows, 2, 1, projection='3d')
    idq_torque(id, iq, torque)

    fig.add_subplot(rows, 2, 2, projection='3d')
    idq_psid(id, iq, psid)

    fig.add_subplot(rows, 2, 3, projection='3d')
    idq_psiq(id, iq, psiq)

    fig.add_subplot(rows, 2, 4, projection='3d')
    idq_psim(id, iq, psim)

    fig.add_subplot(rows, 2, 5, projection='3d')
    idq_ld(id, iq, ld)

    fig.add_subplot(rows, 2, 6, projection='3d')
    idq_lq(id, iq, lq)