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Description
Bug summary
With mpl <3.7 this code works the code snippet below works but it is broken in 3.7.0 and 3.7.1. The odd thing is that if I move the colorbar to the last line or if I don't use pandas to the the C plotting it works just fine. I guess there is a bad interaction somewhere that is messing up with the subplots.
Code for reproduction
import matplotlib.pyplot as plt
import pandas as pd
fig = plt.figure()
axes = fig.subplot_mosaic(
"""
AB
CC
"""
)
x = [1, 2, 3]
y = [1, 2, 3]
cs0 = axes["A"].scatter(x, y)
cs1 = axes["B"].scatter(x, y)
fig.colorbar(cs0, ax=[axes["A"], axes["B"]], location="right")
axes["C"].plot(x)
pd.DataFrame(x).plot(ax=axes["C"])Actual outcome
AttributeError Traceback (most recent call last)
Cell In[10], line 21
19 fig.colorbar(cs0, ax=[axes["A"], axes["B"]], location="right")
20 axes["C"].plot(x)
---> 21 pd.DataFrame(x).plot(ax=axes["C"])
22 # fig.colorbar(cs0, ax=[axes["A"], axes["B"]], location="right")
File ~/micromamba/envs/TEST/lib/python3.11/site-packages/pandas/plotting/_core.py:1000, in PlotAccessor.__call__(self, *args, **kwargs)
997 label_name = label_kw or data.columns
998 data.columns = label_name
-> 1000 return plot_backend.plot(data, kind=kind, **kwargs)
File ~/micromamba/envs/TEST/lib/python3.11/site-packages/pandas/plotting/_matplotlib/__init__.py:71, in plot(data, kind, **kwargs)
69 kwargs["ax"] = getattr(ax, "left_ax", ax)
70 plot_obj = PLOT_CLASSES[kind](data, **kwargs)
---> 71 plot_obj.generate()
72 plot_obj.draw()
73 return plot_obj.result
File ~/micromamba/envs/TEST/lib/python3.11/site-packages/pandas/plotting/_matplotlib/core.py:455, in MPLPlot.generate(self)
453 self._add_table()
454 self._make_legend()
--> 455 self._adorn_subplots()
457 for ax in self.axes:
458 self._post_plot_logic_common(ax, self.data)
File ~/micromamba/envs/TEST/lib/python3.11/site-packages/pandas/plotting/_matplotlib/core.py:679, in MPLPlot._adorn_subplots(self)
677 all_axes = self._get_subplots()
678 nrows, ncols = self._get_axes_layout()
--> 679 handle_shared_axes(
680 axarr=all_axes,
681 nplots=len(all_axes),
682 naxes=nrows * ncols,
683 nrows=nrows,
684 ncols=ncols,
685 sharex=self.sharex,
686 sharey=self.sharey,
687 )
689 for ax in self.axes:
690 ax = getattr(ax, "right_ax", ax)
File ~/micromamba/envs/TEST/lib/python3.11/site-packages/pandas/plotting/_matplotlib/tools.py:410, in handle_shared_axes(axarr, nplots, naxes, nrows, ncols, sharex, sharey)
408 layout = np.zeros((nrows + 1, ncols + 1), dtype=np.bool_)
409 for ax in axarr:
--> 410 layout[row_num(ax), col_num(ax)] = ax.get_visible()
412 for ax in axarr:
413 # only the last row of subplots should get x labels -> all
414 # other off layout handles the case that the subplot is
415 # the last in the column, because below is no subplot/gap.
416 if not layout[row_num(ax) + 1, col_num(ax)]:
File ~/micromamba/envs/TEST/lib/python3.11/site-packages/pandas/plotting/_matplotlib/tools.py:396, in handle_shared_axes.<locals>.<lambda>(x)
386 def handle_shared_axes(
387 axarr: Iterable[Axes],
388 nplots: int,
(...)
393 sharey: bool,
394 ):
395 if nplots > 1:
--> 396 row_num = lambda x: x.get_subplotspec().rowspan.start
397 col_num = lambda x: x.get_subplotspec().colspan.start
399 if compat.mpl_ge_3_4_0():
AttributeError: 'NoneType' object has no attribute 'rowspan'
Expected outcome
Additional information
No response
Operating system
No response
Matplotlib Version
3.7.0 and 3.7.1
Matplotlib Backend
module://matplotlib_inline.backend_inline
Python version
3.11
Jupyter version
6.5.3
Installation
conda
eldad-a