8000 [MRG+1] plot_date() after axhline() doesn't rescale axes by Yasaman-Mah · Pull Request #8205 · matplotlib/matplotlib · GitHub
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[MRG+1] plot_date() after axhline() doesn't rescale axes #8205

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[MRG+1] plot_date() after axhline() doesn't rescale axes #8205

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f758834
Allow choosing logit scale in qt figure options.
anntzer Feb 4, 2017
24b21ae
Merge pull request #2 from matplotlib/master
Feb 5, 2017
45eadc1
Merge pull request #3 from matplotlib/master
Mar 4, 2017
7eceed5
fix #7742
Yasaman-Mah Mar 4, 2017
52beee2
test case for bug fix 7742
Yasaman-Mah Mar 4, 2017
a3dbc3c
fixed indentation
Yasaman-Mah Mar 4, 2017
b37ffc5
fix pep8
Mar 7, 2017
e083a81
fix merge conflict (add both tests)
Mar 7, 2017
ad03e22
Merge branch 'matplotlib-master' into fix7742
Mar 7, 2017
4fa59c6
added similar changes to axvline.
Yasaman-Mah Mar 16, 2017
4e516f2
resolved merge conflicts in test_axes.py.
Yasaman-Mah Mar 16, 2017
8c9ef18
fixed pep8 errors.
Yasaman-Mah Mar 16, 2017
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1 change: 1 addition & 0 deletions lib/matplotlib/axes/_axes.py
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Expand Up @@ -725,6 +725,7 @@ def axhline(self, y=0, xmin=0, xmax=1, **kwargs):
trans = self.get_yaxis_transform(which='grid')
l = mlines.Line2D([xmin, xmax], [y, y], transform=trans, **kwargs)
self.add_line(l)
self.ignore_existing_data_limits = True
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Can you add a symmetric change to axvline ?

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@Yasaman-Mah Yasaman-Mah Mar 17, 2017 •
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I have made a similar change to axvline. Please see my comment below before approving the changes.

self.autoscale_view(scalex=False, scaley=scaley)
return l

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18 changes: 18 additions & 0 deletions lib/matplotlib/tests/test_axes.py
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Expand Up @@ -4972,3 +4972,21 @@ def test_bar_single_height():
ax.bar(range(4), 1)
# Check that a horizontal chart with one width works
ax.bar(0, 1, bottom=range(4), width=1, orientation='horizontal')

def test_datetime_axhline_same_axes():
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The pep8 checker is probably going to want 2 blank lines between functions

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Looks like you'll also need to trim trailing whitespace:
https://travis-ci.org/matplotlib/matplotlib/jobs/208246492#L1683

# This test was suggested by Paul Hobson (@phobson) regarding issue 7742
# Check when ploting datetime data and horizontal line < 571F /span>
# order of plotting doesn't matter.
# axhline() should not change x axis limits.
from datetime import datetime
fig, axs = plt.subplots(2, 1)
xvalues = [datetime(2016, 1, 1, 0, 0, 0), datetime(2016, 1, 2, 0, 0, 0)]
yvalues = [1, 2]

axs[0].plot(xvalues, yvalues)
axs[0].axhline(1.5)

axs[1].axhline(1.5)
axs[1].plot(xvalues, yvalues)

assert (axs[0].get_xlim() == axs[1].get_xlim())
0