Description
Bug report
Bug summary
The code below raises DeprecationWarning from pandas=1.0.0rc0 when plt.plot is fed with two pandas.Series (using my matplotlib=3.1.0 instance). It reproduces also when the series is not empty, and also when plotting two different series as x and y.
Code for reproduction
import pandas as pd
import matplotlib.pyplot as plt
x = pd.Series([], dtype="float64")
plt.plot(x, x)Actual outcome
Traceback (most recent call last):
File "pandas1.py", line 5, in <module>
plt.plot(x, x)
File "/lib/python3.7/site-packages/matplotlib/pyplot.py", line 2789, in plot
is not None else {}), **kwargs)
File "/lib/python3.7/site-packages/matplotlib/axes/_axes.py", line 1666, in plot
lines = [*self._get_lines(*args, data=data, **kwargs)]
File "/lib/python3.7/site-packages/matplotlib/axes/_base.py", line 225, in __call__
yield from self._plot_args(this, kwargs)
File "/lib/python3.7/site-packages/matplotlib/axes/_base.py", line 386, in _plot_args
x = _check_1d(tup[0])
File "/lib/python3.7/site-packages/matplotlib/cbook/__init__.py", line 1402, in _check_1d
x[:, None]
File "/lib/python3.7/site-packages/pandas/core/series.py", line 865, in __getitem__
return self._get_with(key)
File "/lib/python3.7/site-packages/pandas/core/series.py", line 878, in _get_with
return self._get_values_tuple(key)
File "/lib/python3.7/site-packages/pandas/core/series.py", line 920, in _get_values_tuple
return self._get_values(key)
File "/lib/python3.7/site-packages/pandas/core/series.py", line 934, in _get_values
self._data.get_slice(indexer), fastpath=True
File "/lib/python3.7/site-packages/pandas/core/internals/managers.py", line 1542, in get_slice
return type(self)(self._block._slice(slobj), self.index[slobj], fastpath=True)
File "/lib/python3.7/site-packages/pandas/core/indexes/range.py", line 708, in __getitem__
return super().__getitem__(key)
File "/lib/python3.7/site-packages/pandas/core/indexes/base.py", line 3908, in __getitem__
deprecate_ndim_indexing(result)
File "/lib/python3.7/site-packages/pandas/core/indexes/base.py", line 5553, in deprecate_ndim_indexing
stacklevel=3,
DeprecationWarning: Support for multi-dimensional indexing (e.g. `index[:, None]`) on an Index is deprecated and will be removed in a future version. Convert to a numpy array before indexing instead.
Expected outcome
No warnings.
Matplotlib version
- Operating system: linux
- Matplotlib version: 3.1.0
- Matplotlib backend (
print(matplotlib.get_backend())): agg - Python version: 3.7.3
- Other libraries: pandas=1.0.0rc0
python and matplotlib obtained through anaconda, pandas through pip