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Commitd08293a

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Backport PR#30327: FIX Update Axes limits from Axes.add_collection(... autolim=True) (#30351)
Co-authored-by: Thomas A Caswell <tcaswell@gmail.com>
1 parentb4c1acd commitd08293a

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2 files changed

+26
-9
lines changed

2 files changed

+26
-9
lines changed

‎lib/matplotlib/axes/_base.py‎

Lines changed: 11 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2373,7 +2373,17 @@ def add_collection(self, collection, autolim=True):
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# the call so that self.dataLim will update its own minpos.
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# This ensures that log scales see the correct minimum.
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points=np.concatenate([points, [datalim.minpos]])
2376-
self.update_datalim(points)
2376+
# only update the dataLim for x/y if the collection uses transData
2377+
# in this direction.
2378+
x_is_data,y_is_data= (collection.get_transform()
2379+
.contains_branch_seperately(self.transData))
2380+
ox_is_data,oy_is_data= (collection.get_offset_transform()
2381+
.contains_branch_seperately(self.transData))
2382+
self.update_datalim(
2383+
points,
2384+
updatex=x_is_dataorox_is_data,
2385+
updatey=y_is_dataoroy_is_data,
2386+
)
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self.stale=True
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returncollection

‎lib/matplotlib/tests/test_collections.py‎

Lines changed: 15 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -877,17 +877,24 @@ def test_collection_set_array():
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deftest_blended_collection_autolim():
880-
a= [1,2,4]
881-
height=.2
880+
f,ax=plt.subplots()
882881

883-
xy_pairs=np.column_stack([np.repeat(a,2),np.tile([0,height],len(a))])
884-
line_segs=xy_pairs.reshape([len(a),2,2])
882+
# sample data to give initial data limits
883+
ax.plot([2,3,4], [0.4,0.6,0.5])
884+
np.testing.assert_allclose((ax.dataLim.xmin,ax.dataLim.xmax), (2,4))
885+
data_ymin,data_ymax=ax.dataLim.ymin,ax.dataLim.ymax
885886

886-
f,ax=plt.subplots()
887+
# LineCollection with vertical lines spanning the Axes vertical, using transAxes
888+
x= [1,2,3,4,5]
889+
vertical_lines= [np.array([[xi,0], [xi,1]])forxiinx]
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trans=mtransforms.blended_transform_factory(ax.transData,ax.transAxes)
888-
ax.add_collection(LineCollection(line_segs,transform=trans))
889-
ax.autoscale_view(scalex=True,scaley=False)
890-
np.testing.assert_allclose(ax.get_xlim(), [1.,4.])
891+
ax.add_collection(LineCollection(vertical_lines,transform=trans))
892+
893+
# check that the x data limits are updated to include the LineCollection
894+
np.testing.assert_allclose((ax.dataLim.xmin,ax.dataLim.xmax), (1,5))
895+
# check that the y data limits are not updated (because they are not transData)
896+
np.testing.assert_allclose((ax.dataLim.ymin,ax.dataLim.ymax),
897+
(data_ymin,data_ymax))
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deftest_singleton_autolim():

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