Function test_grayscale_alpha

lib/matplotlib/tests/test_backend_pdf.py:313–321

Masking images with NaN did not work for grayscale images

()

@image_comparison(['grayscale_alpha.pdf'], style='_classic_test')
def test_grayscale_alpha():
    """Masking images with NaN did not work for grayscale images"""
    x, y = np.ogrid[-2:2:.1, -2:2:.1]
    dd = np.exp(-(x**2 + y**2))
    dd[dd < .1] = np.nan
    fig, ax = plt.subplots()
    ax.imshow(dd, interpolation='none', cmap='gray_r')
    ax.set_xticks([])
    ax.set_yticks([])


@mpl.style.context('default')