/usr/lib/python3/dist-packages/matplotlib/tests/test_tightlayout.py is in python3-matplotlib 2.0.0+dfsg1-2.
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unicode_literals)
import six
import warnings
import numpy as np
from matplotlib.testing.decorators import image_comparison, knownfailureif
import matplotlib.pyplot as plt
from nose.tools import assert_raises
from numpy.testing import assert_array_equal
from matplotlib.offsetbox import AnchoredOffsetbox, DrawingArea
from matplotlib.patches import Rectangle
def example_plot(ax, fontsize=12):
ax.plot([1, 2])
ax.locator_params(nbins=3)
ax.set_xlabel('x-label', fontsize=fontsize)
ax.set_ylabel('y-label', fontsize=fontsize)
ax.set_title('Title', fontsize=fontsize)
@image_comparison(baseline_images=['tight_layout1'])
def test_tight_layout1():
'Test tight_layout for a single subplot'
fig = plt.figure()
ax = fig.add_subplot(111)
example_plot(ax, fontsize=24)
plt.tight_layout()
@image_comparison(baseline_images=['tight_layout2'])
def test_tight_layout2():
'Test tight_layout for mutiple subplots'
fig, ((ax1, ax2), (ax3, ax4)) = plt.subplots(nrows=2, ncols=2)
example_plot(ax1)
example_plot(ax2)
example_plot(ax3)
example_plot(ax4)
plt.tight_layout()
@image_comparison(baseline_images=['tight_layout3'])
def test_tight_layout3():
'Test tight_layout for mutiple subplots'
fig = plt.figure()
ax1 = plt.subplot(221)
ax2 = plt.subplot(223)
ax3 = plt.subplot(122)
example_plot(ax1)
example_plot(ax2)
example_plot(ax3)
plt.tight_layout()
@image_comparison(baseline_images=['tight_layout4'],
freetype_version=('2.4.5', '2.4.9'))
def test_tight_layout4():
'Test tight_layout for subplot2grid'
fig = plt.figure()
ax1 = plt.subplot2grid((3, 3), (0, 0))
ax2 = plt.subplot2grid((3, 3), (0, 1), colspan=2)
ax3 = plt.subplot2grid((3, 3), (1, 0), colspan=2, rowspan=2)
ax4 = plt.subplot2grid((3, 3), (1, 2), rowspan=2)
example_plot(ax1)
example_plot(ax2)
example_plot(ax3)
example_plot(ax4)
plt.tight_layout()
@image_comparison(baseline_images=['tight_layout5'])
def test_tight_layout5():
'Test tight_layout for image'
fig = plt.figure()
ax = plt.subplot(111)
arr = np.arange(100).reshape((10, 10))
ax.imshow(arr, interpolation="none")
plt.tight_layout()
@image_comparison(baseline_images=['tight_layout6'])
def test_tight_layout6():
'Test tight_layout for gridspec'
# This raises warnings since tight layout cannot
# do this fully automatically. But the test is
# correct since the layout is manually edited
with warnings.catch_warnings():
warnings.simplefilter("ignore", UserWarning)
fig = plt.figure()
import matplotlib.gridspec as gridspec
gs1 = gridspec.GridSpec(2, 1)
ax1 = fig.add_subplot(gs1[0])
ax2 = fig.add_subplot(gs1[1])
example_plot(ax1)
example_plot(ax2)
gs1.tight_layout(fig, rect=[0, 0, 0.5, 1])
gs2 = gridspec.GridSpec(3, 1)
for ss in gs2:
ax = fig.add_subplot(ss)
example_plot(ax)
ax.set_title("")
ax.set_xlabel("")
ax.set_xlabel("x-label", fontsize=12)
gs2.tight_layout(fig, rect=[0.5, 0, 1, 1], h_pad=0.45)
top = min(gs1.top, gs2.top)
bottom = max(gs1.bottom, gs2.bottom)
gs1.tight_layout(fig, rect=[None, 0 + (bottom-gs1.bottom),
0.5, 1 - (gs1.top-top)])
gs2.tight_layout(fig, rect=[0.5, 0 + (bottom-gs2.bottom),
None, 1 - (gs2.top-top)],
h_pad=0.45)
@image_comparison(baseline_images=['tight_layout7'])
def test_tight_layout7():
# tight layout with left and right titles
fig = plt.figure()
fontsize = 24
ax = fig.add_subplot(111)
ax.plot([1, 2])
ax.locator_params(nbins=3)
ax.set_xlabel('x-label', fontsize=fontsize)
ax.set_ylabel('y-label', fontsize=fontsize)
ax.set_title('Left Title', loc='left', fontsize=fontsize)
ax.set_title('Right Title', loc='right', fontsize=fontsize)
plt.tight_layout()
@image_comparison(baseline_images=['tight_layout8'])
def test_tight_layout8():
'Test automatic use of tight_layout'
fig = plt.figure()
fig.set_tight_layout({'pad': .1})
ax = fig.add_subplot(111)
example_plot(ax, fontsize=24)
# The following test is misleading when the text is removed.
@image_comparison(baseline_images=['outward_ticks'], remove_text=False)
def test_outward_ticks():
'Test automatic use of tight_layout'
fig = plt.figure()
ax = fig.add_subplot(221)
ax.xaxis.set_tick_params(tickdir='out', length=16, width=3)
ax.yaxis.set_tick_params(tickdir='out', length=16, width=3)
ax.xaxis.set_tick_params(
tickdir='out', length=32, width=3, tick1On=True, which='minor')
ax.yaxis.set_tick_params(
tickdir='out', length=32, width=3, tick1On=True, which='minor')
# The following minor ticks are not labelled, and they
# are drawn over the major ticks and labels--ugly!
ax.xaxis.set_ticks([0], minor=True)
ax.yaxis.set_ticks([0], minor=True)
ax = fig.add_subplot(222)
ax.xaxis.set_tick_params(tickdir='in', length=32, width=3)
ax.yaxis.set_tick_params(tickdir='in', length=32, width=3)
ax = fig.add_subplot(223)
ax.xaxis.set_tick_params(tickdir='inout', length=32, width=3)
ax.yaxis.set_tick_params(tickdir='inout', length=32, width=3)
ax = fig.add_subplot(224)
ax.xaxis.set_tick_params(tickdir='out', length=32, width=3)
ax.yaxis.set_tick_params(tickdir='out', length=32, width=3)
plt.tight_layout()
def add_offsetboxes(ax, size=10, margin=.1, color='black'):
"""
Surround ax with OffsetBoxes
"""
m, mp = margin, 1+margin
anchor_points = [(-m, -m), (-m, .5), (-m, mp),
(mp, .5), (.5, mp), (mp, mp),
(.5, -m), (mp, -m), (.5, -m)]
for point in anchor_points:
da = DrawingArea(size, size)
background = Rectangle((0, 0), width=size,
height=size,
facecolor=color,
edgecolor='None',
linewidth=0,
antialiased=False)
da.add_artist(background)
anchored_box = AnchoredOffsetbox(
loc=10,
child=da,
pad=0.,
frameon=False,
bbox_to_anchor=point,
bbox_transform=ax.transAxes,
borderpad=0.)
ax.add_artist(anchored_box)
return anchored_box
@image_comparison(baseline_images=['tight_layout_offsetboxes1',
'tight_layout_offsetboxes2'])
def test_tight_layout_offsetboxes():
# 1.
# - Create 4 subplots
# - Plot a diagonal line on them
# - Surround each plot with 7 boxes
# - Use tight_layout
# - See that the squares are included in the tight_layout
# and that the squares in the middle do not overlap
#
# 2.
# - Make the squares around the right side axes invisible
# - See that the invisible squares do not affect the
# tight_layout
rows = cols = 2
colors = ['red', 'blue', 'green', 'yellow']
x = y = [0, 1]
def _subplots():
_, axs = plt.subplots(rows, cols)
axs = axs.flat
for ax, color in zip(axs, colors):
ax.plot(x, y, color=color)
add_offsetboxes(ax, 20, color=color)
return axs
# 1.
axs = _subplots()
plt.tight_layout()
# 2.
axs = _subplots()
for ax in (axs[cols-1::rows]):
for child in ax.get_children():
if isinstance(child, AnchoredOffsetbox):
child.set_visible(False)
plt.tight_layout()
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