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Commit0d2c436

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Merge pull request#11407 from anntzer/step-markers
FIX: Properly position markers in step plots.
2 parentsec0b049 +3df886b commit0d2c436

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2 files changed

+32
-4
lines changed

2 files changed

+32
-4
lines changed

‎lib/matplotlib/lines.py

Lines changed: 18 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -739,16 +739,17 @@ def draw(self, renderer):
739739
subslice=slice(max(i0-1,0),i1+1)
740740
self.ind_offset=subslice.start
741741
self._transform_path(subslice)
742-
743-
transf_path=self._get_transformed_path()
742+
else:
743+
subslice=None
744744

745745
ifself.get_path_effects():
746746
frommatplotlib.patheffectsimportPathEffectRenderer
747747
renderer=PathEffectRenderer(self.get_path_effects(),renderer)
748748

749749
renderer.open_group('line2d',self.get_gid())
750750
ifself._lineStyles[self._linestyle]!='_draw_nothing':
751-
tpath,affine=transf_path.get_transformed_path_and_affine()
751+
tpath,affine= (self._get_transformed_path()
752+
.get_transformed_path_and_affine())
752753
iflen(tpath.vertices):
753754
gc=renderer.new_gc()
754755
self._set_gc_clip(gc)
@@ -796,7 +797,20 @@ def draw(self, renderer):
796797
gc.set_foreground(ec_rgba,isRGBA=True)
797798

798799
marker=self._marker
799-
tpath,affine=transf_path.get_transformed_points_and_affine()
800+
801+
# Markers *must* be drawn ignoring the drawstyle (but don't pay the
802+
# recaching if drawstyle is already "default").
803+
ifself.get_drawstyle()!="default":
804+
withcbook._setattr_cm(
805+
self,_drawstyle="default",_transformed_path=None):
806+
self.recache()
807+
self._transform_path(subslice)
808+
tpath,affine= (self._get_transformed_path()
809+
.get_transformed_path_and_affine())
810+
else:
811+
tpath,affine= (self._get_transformed_path()
812+
.get_transformed_path_and_affine())
813+
800814
iflen(tpath.vertices):
801815
# subsample the markers if markevery is not None
802816
markevery=self.get_markevery()

‎lib/matplotlib/tests/test_lines.py

Lines changed: 14 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,8 @@
11
"""
22
Tests specific to the lines module.
33
"""
4+
5+
fromioimportBytesIO
46
importitertools
57
importmatplotlib.linesasmlines
68
importpytest
@@ -195,3 +197,15 @@ def test_nan_is_sorted():
195197
assertline._is_sorted(np.array([1,2,3]))
196198
assertline._is_sorted(np.array([1,np.nan,3]))
197199
assertnotline._is_sorted([3,5]+ [np.nan]*100+ [0,2])
200+
201+
202+
deftest_step_markers():
203+
fig,ax=plt.subplots()
204+
ax.step([0,1],"-o")
205+
buf1=BytesIO()
206+
fig.savefig(buf1)
207+
fig,ax=plt.subplots()
208+
ax.plot([0,0,1], [0,1,1],"-o",markevery=[0,2])
209+
buf2=BytesIO()
210+
fig.savefig(buf2)
211+
assertbuf1.getvalue()==buf2.getvalue()

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