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Fix stairs() tests #18579

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Oct 1, 2020
Merged

Fix stairs() tests #18579

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71dc2d6
Fix stairs() tests
timhoffm Sep 25, 2020
96ebbed
Adapt Line2D styles in tests so that it matches the PathPatch style
timhoffm Sep 27, 2020
b2fd5ed
fix test_stairs_update
timhoffm Sep 28, 2020
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2 changes: 2 additions & 0 deletions lib/matplotlib/patches.py
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Original file line number Diff line number Diff line change
Expand Up @@ -996,6 +996,8 @@ class StepPatch(PathPatch):
The path is unclosed. It starts and stops at baseline.
"""

_edge_default = False

@docstring.dedent_interpd
def __init__(self, values, edges, *,
orientation='vertical', baseline=0, **kwargs):
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87 changes: 45 additions & 42 deletions lib/matplotlib/tests/test_axes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1806,82 +1806,84 @@ def test_hist_zorder(histtype, zorder):
assert patch.get_zorder() == zorder


@check_figures_equal()
@check_figures_equal(extensions=['png'])
def test_stairs(fig_test, fig_ref):
import matplotlib.lines as mlines
y = np.array([6, 14, 32, 37, 48, 32, 21, 4]) # hist
x = np.array([1., 2., 3., 4., 5., 6., 7., 8., 9.]) # bins

fig_test, test_axes = plt.subplots(3, 2)
test_axes = test_axes.flatten()
test_axes = fig_test.subplots(3, 2).flatten()
test_axes[0].stairs(y, x, baseline=None)
test_axes[1].stairs(y, x, baseline=None, orientation='horizontal')
test_axes[2].stairs(y, x)
test_axes[3].stairs(y, x, orientation='horizontal')
test_axes[4].stairs(y, x)
test_axes[4].semilogy()
test_axes[5].stairs(y, x, orientation='horizontal')
test_axes[5].semilogy()
test_axes[5].semilogx()

fig_ref, ref_axes = plt.subplots(3, 2)
ref_axes = ref_axes.flatten()
ref_axes[0].plot(x, np.append(y, y[-1]), drawstyle='steps-post')
ref_axes[1].plot(np.append(y[0], y), x, drawstyle='steps-post')
# defaults of `PathPatch` to be used for all following Line2D
style = {'solid_joinstyle': 'miter', 'solid_capstyle': 'butt'}

ref_axes[2].plot(x, np.append(y, y[-1]), drawstyle='steps-post')
ref_axes[2].add_line(mlines.Line2D([x[0], x[0]], [0, y[0]]))
ref_axes[2].add_line(mlines.Line2D([x[-1], x[-1]], [0, y[-1]]))
ref_axes = fig_ref.subplots(3, 2).flatten()
ref_axes[0].plot(x, np.append(y, y[-1]), drawstyle='steps-post', **style)
ref_axes[1].plot(np.append(y[0], y), x, drawstyle='steps-post', **style)

ref_axes[2].plot(x, np.append(y, y[-1]), drawstyle='steps-post', **style)
ref_axes[2].add_line(mlines.Line2D([x[0], x[0]], [0, y[0]], **style))
ref_axes[2].add_line(mlines.Line2D([x[-1], x[-1]], [0, y[-1]], **style))
ref_axes[2].set_ylim(0, None)

ref_axes[3].plot(np.append(y[0], y), x, drawstyle='steps-post')
ref_axes[3].add_line(mlines.Line2D([0, y[0]], [x[0], x[0]]))
ref_axes[3].add_line(mlines.Line2D([0, y[-1]], [x[-1], x[-1]]))
ref_axes[3].plot(np.append(y[0], y), x, drawstyle='steps-post', **style)
ref_axes[3].add_line(mlines.Line2D([0, y[0]], [x[0], x[0]], **style))
ref_axes[3].add_line(mlines.Line2D([0, y[-1]], [x[-1], x[-1]], **style))
ref_axes[3].set_xlim(0, None)

ref_axes[4].plot(x, np.append(y, y[-1]), drawstyle='steps-post')
ref_axes[4].add_line(mlines.Line2D([x[0], x[0]], [0, y[0]]))
ref_axes[4].add_line(mlines.Line2D([x[-1], x[-1]], [0, y[-1]]))
ref_axes[4].plot(x, np.append(y, y[-1]), drawstyle='steps-post', **style)
ref_axes[4].add_line(mlines.Line2D([x[0], x[0]], [0, y[0]], **style))
ref_axes[4].add_line(mlines.Line2D([x[-1], x[-1]], [0, y[-1]], **style))
ref_axes[4].semilogy()

ref_axes[5].plot(np.append(y[0], y), x, drawstyle='steps-post')
ref_axes[5].add_line(mlines.Line2D([0, y[0]], [x[0], x[0]]))
ref_axes[5].add_line(mlines.Line2D([0, y[-1]], [x[-1], x[-1]]))
ref_axes[5].plot(np.append(y[0], y), x, drawstyle='steps-post', **style)
ref_axes[5].add_line(mlines.Line2D([0, y[0]], [x[0], x[0]], **style))
ref_axes[5].add_line(mlines.Line2D([0, y[-1]], [x[-1], x[-1]], **style))
ref_axes[5].semilogx()


@check_figures_equal()
@check_figures_equal(extensions=['png'])
def test_stairs_fill(fig_test, fig_ref):
h, bins = [1, 2, 3, 4, 2], [0, 1, 2, 3, 4, 5]
bs = -2
# Test
fig_test, test_axes = plt.subplots(2, 2)
test_axes = test_axes.flatten()
test_axes = fig_test.subplots(2, 2).flatten()
test_axes[0].stairs(h, bins, fill=True)
test_axes[1].stairs(h, bins, orientation='horizontal', fill=True)
test_axes[2].stairs(h, bins, baseline=bs, fill=True)
test_axes[3].stairs(h, bins, baseline=bs, orientation='horizontal',
fill=True)
fill=True)

# # Ref
fig_ref, ref_axes = plt.subplots(2, 2)
ref_axes = ref_axes.flatten()
ref_axes[0].fill_between(bins, np.append(h, h[-1]), step='post')
ref_axes = fig_ref.subplots(2, 2).flatten()
ref_axes[0].fill_between(bins, np.append(h, h[-1]), step='post', lw=0)
ref_axes[0].set_ylim(0, None)
ref_axes[1].fill_betweenx(bins, np.append(h, h[-1]), step='post')
ref_axes[1].fill_betweenx(bins, np.append(h, h[-1]), step='post', lw=0)
ref_axes[1].set_xlim(0, None)
ref_axes[2].fill_between(bins, np.append(h, h[-1]),
np.ones(len(h)+1)*bs, step='post')
np.ones(len(h)+1)*bs, step='post', lw=0)
ref_axes[2].set_ylim(bs, None)
ref_axes[3].fill_betweenx(bins, np.append(h, h[-1]),
np.ones(len(h)+1)*bs, step='post')
np.ones(len(h)+1)*bs, step='post', lw=0)
ref_axes[3].set_xlim(bs, None)


@check_figures_equal()
@check_figures_equal(extensions=['png'])
def test_stairs_update(fig_test, fig_ref):
# fixed ylim because stairs() does autoscale, but updating data does not
ylim = -3, 4
# Test
fig_test, test_ax = plt.subplots()
test_ax = fig_test.add_subplot()
h = test_ax.stairs([1, 2, 3])
test_ax.set_ylim(ylim)
h.set_values([3, 2, 1])
h.set_edges(np.arange(4)+2)
h.set_data([1, 2, 1], np.arange(4)/2)
Expand All @@ -1892,31 +1894,32 @@ def test_stairs_update(fig_test, fig_ref):
h.set_baseline(-2)
assert h.get_baseline() == -2

# # Ref
fig_ref, ref_ax = plt.subplots()
# Ref
ref_ax = fig_ref.add_subplot()
h = ref_ax.stairs([1, 2, 3], baseline=-2)
ref_ax.set_ylim(ylim)


@pytest.mark.xfail
def test_stairs_invalid_nan():
plt.stairs([1, 2], [0, np.nan, 1])
with pytest.raises(ValueError, match='Nan values in "edges"'):
plt.stairs([1, 2], [0, np.nan, 1])


@pytest.mark.xfail
def test_stairs_invalid_mismatch():
plt.stairs([1, 2], [0, 1])
with pytest.raises(ValueError, match='Size mismatch'):
plt.stairs([1, 2], [0, 1])


@pytest.mark.xfail
def test_stairs_invalid_update():
h = plt.stairs([1, 2], [0, 1, 2])
h.set_edges([1, np.nan, 2])
with pytest.raises(ValueError, match='Nan values in "edges"'):
h.set_edges([1, np.nan, 2])


@pytest.mark.xfail
def test_stairs_invalid_update2():
h = plt.stairs([1, 2], [0, 1, 2])
h.set_edges(np.arange(5))
with pytest.raises(ValueError, match='Size mismatch'):
h.set_edges(np.arange(5))


@image_comparison(['test_stairs_options.png'], remove_text=True)
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