1872ec1a1359fc4486f244b7e6e561cbbba10882,nilearn/decomposition/tests/test_canica.py,,test_component_sign,#,84

Before Change

    // have some +1"s (so things are not degenerate), but still have more -1"s
    // than +1"s
    for mp in components:
        mp[rng.randn(*mp.shape) > .8] *= -.5
        assert_less_than(mp.max(), -mp.min())

    // fit run CanICA at different times of the day
    canica = CanICA(n_components=4, random_state=rng, mask=mask_img)
    for _ in range(3):
        canica.fit(data)
        maps = canica.masker_.inverse_transform(canica.components_).get_data()

After Change

    // BF for issue /맒

    // make data (SVD)
    rng = np.random.RandomState(0)
    shape = (20, 10, 1)
    affine = np.eye(4)
    components = _make_canica_components(shape)

    // make more de-activations than activations
    for mp in components:
        mp[rng.randn(*mp.shape) > .8] *= -1.
        assert_less_than(mp.max(), -mp.min())  // goal met ?
    data = _make_data_from_components(components, affine, shape,
                                      rng=rng, n_subjects=2)

    // synthesize data with given components
    data = _make_data_from_components(components, affine, shape, rng=rng,
                                      n_subjects=2)
    mask_img = nibabel.Nifti1Image(np.ones(shape, dtype=np.int8), affine)

    // fit run CanICA at different times of the day
    canica = CanICA(n_components=4, random_state=rng, mask=mask_img)

Instances