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[Sprint] scatter plots are (reportedly) too slow #2156

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Merged
mdboom merged 2 commits into from
Sep 30, 2013
Merged

[Sprint] scatter plots are (reportedly) too slow #2156

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d75d39f
Use dstack instead of zip to combine offset arrays in scatter.
mdboom Jul 22, 2013
b8726d0
Store transformations on collections as an Nx3x3 array, rather than a…
mdboom Jul 22, 2013
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Use dstack instead of zip to combine offset arrays in scatter.
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@mdboom
mdboom committed Sep 30, 2013
commit d75d39ff32e1c05b1fc919420e9d7e4af1ccc53d
4 changes: 3 additions & 1 deletion lib/matplotlib/axes/_axes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3269,12 +3269,14 @@ def scatter(self, x, y, s=20, c='b', marker='o', cmap=None, norm=None,
if not marker_obj.is_filled():
edgecolors = 'face'

offsets = np.dstack((x, y))

collection = mcoll.PathCollection(
(path,), scales,
facecolors=colors,
edgecolors=edgecolors,
linewidths=linewidths,
offsets=list(zip(x, y)),
offsets=offsets,
transOffset=kwargs.pop('transform', self.transData),
)
collection.set_transform(mtransforms.IdentityTransform())
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