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Eventplot edgecases #7602

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Eventplot edgecases #7602

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2b5ea43
Fix eventplot where zero-length arrays are given for some properties
dstansby Dec 10, 2016
c739dd5
Set line properties to defaults instead of None
dstansby Dec 10, 2016
bcedb01
Add test for zero length arguments to eventplot
dstansby Dec 10, 2016
775c6f0
Document what happens when zero length arrays are passed to eventplot
dstansby Dec 10, 2016
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18 changes: 10 additions & 8 deletions lib/matplotlib/axes/_axes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1110,10 +1110,12 @@ def eventplot(self, positions, orientation='horizontal', lineoffsets=1,
"vertical' : lines will be horizontal and arranged in columns

*lineoffsets* :
A float or array-like containing floats.
A float or array-like containing floats. If a zero length array,
defaults to 0.

*linelengths* :
A float or array-like containing floats.
A float or array-like containing floats. If a zero length array,
defaults to 1.

*linewidths* :
A float or array-like containing floats.
Expand All @@ -1124,7 +1126,7 @@ def eventplot(self, positions, orientation='horizontal', lineoffsets=1,

*linestyles* :
[ 'solid' | 'dashed' | 'dashdot' | 'dotted' ] or an array of these
values
values. If a zero length array, defaults to 'solid'.

For linelengths, linewidths, colors, and linestyles, if only a single
value is given, that value is applied to all lines. If an array-like
Expand Down Expand Up @@ -1183,13 +1185,13 @@ def eventplot(self, positions, orientation='horizontal', lineoffsets=1,
linewidths = np.asarray(linewidths)

if len(lineoffsets) == 0:
lineoffsets = [None]
lineoffsets = [0]
if len(linelengths) == 0:
linelengths = [None]
if len(linewidths) == 0:
lineoffsets = [None]
linelengths = [1]
if len(linewidths) == 0:
lineoffsets = [None]
linewidths = [None]
if len(linestyles) == 0:
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@tacaswell tacaswell Dec 10, 2016

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I understand why to do this for symmetry, but this is a odd special case. Why would you pass in an empty list to get the default behavior?

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@anntzer anntzer Aug 30, 2017

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I guess one could also ask why one would want to pass an empty list to get the default for any of the earlier parameters... (unless there's a compelling reason, we should get rid of that behavior :-))

linestyles = ['solid']
if len(colors) == 0:
colors = [None]

Expand Down
7 changes: 7 additions & 0 deletions lib/matplotlib/tests/test_axes.py
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Expand Up @@ -2770,6 +2770,13 @@ def test_empty_eventplot():
plt.draw()


@cleanup
def test_eventplot_empty_args():
fig, ax = plt.subplots()
ax.eventplot([1, 2, 3], lineoffsets=[], linelengths=[], linewidths=[],
linestyles=[], colors=[])


@image_comparison(baseline_images=['marker_styles'], extensions=['png'], remove_text=True)
def test_marker_styles():
fig = plt.figure()
Expand Down
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