Closed
Description
Bug report
Bug summary
I'm getting this warning:
MatplotlibDeprecationWarning: shading='flat' when X and Y have the same dimensions as C is deprecated since 3.3. Either specify the corners of the quadrilaterals with X and Y, or pass shading='auto', 'nearest' or 'gouraud', or set rcParams['pcolor.shading']. This will become an error two minor releases later.
Code for reproduction
import numpy as np
import matplotlib.pyplot as plt
x = np.arange(10.0)
mat = np.random.randn(10, 10)
plt.contour(x, x, mat)
# for a solid colorbar:
cbar = plt.colorbar()
cbar.filled = True
cbar.draw_all()Actual outcome
Python 3.8.5 (default, Sep 4 2020, 07:30:14)
Type 'copyright', 'credits' or 'license' for more information
IPython 7.18.1 -- An enhanced Interactive Python. Type '?' for help.
In [1]: run ttt
ttt.py:11: MatplotlibDeprecationWarning: shading='flat' when X and Y have the same dimensions as C is deprecated since 3.3. Either specify the corners of the quadrilaterals with X and Y, or pass shading='auto', 'nearest' or 'gouraud', or set rcParams['pcolor.shading']. This will become an error two minor releases later.
cbar.draw_all()
In [2]: import matplotlib
In [3]: matplotlib.__version__
Out[3]: '3.3.1'
In [4]: quit
Expected outcome
No deprecation warning.
Matplotlib version
- Operating system: Linux 5.3.0-64-generic Include test_text in default_test_modules #58-Ubuntu
- Matplotlib version: 3.3.1 (I also tried 3.3.2 -- same result)
- Matplotlib backend (
print(matplotlib.get_backend())): Qt5Agg - Python version: 3.8.5
- Jupyter version (if applicable):
- Other libraries:
Matplotlib installed via conda, default channel.