Bug summary

When trying to create a filled colorbar for a contour plot, I get this:

TypeError: Dimensions of C (13, 1) are incompatible with X (2) and/or Y (13); see help(pcolormesh)

Code for reproduction

import numpy as np
import matplotlib.pyplot as plt
from matplotlib import cm

x = np.arange(10.0)
mat = np.hypot(x, x[:, None])
plt.xlim(-1, 10)
plt.ylim(-1, 10)

plt.figure(1, clear=True)
cntr = plt.contour(x, x, mat, levels=np.arange(13) + 0.5, cmap=cm.PRGn)

# for a solid colorbar:
cbar = plt.colorbar()
cbar.filled = True
cbar.draw_all()

Actual outcome

Python 3.8.12 (default, Oct 12 2021, 13:49:34)
Type 'copyright', 'credits' or 'license' for more information
IPython 7.29.0 -- An enhanced Interactive Python. Type '?' for help.

In [1]: run tt

TypeError Traceback (most recent call last)
~/code/pyyeti/tt.py in
14 cbar = plt.colorbar()
15 cbar.filled = True
---> 16 cbar.draw_all()

~/anaconda3/lib/python3.8/site-packages/matplotlib/colorbar.py in draw_all(self)
597 if self._extend_upper():
598 ind = ind[:-1]
--> 599 self._add_solids(X, Y, self._values[ind, np.newaxis])
600
601 def _add_solids(self, X, Y, C):

~/anaconda3/lib/python3.8/site-packages/matplotlib/colorbar.py in _add_solids(self, X, Y, C)
613 self._add_solids_patches(X, Y, C, mappable)
614 else:
--> 615 self.solids = self.ax.pcolormesh(
616 X, Y, C, cmap=self.cmap, norm=self.norm, alpha=self.alpha,
617 edgecolors='none', shading='flat')

~/anaconda3/lib/python3.8/site-packages/matplotlib/init.py in inner(ax, data, *args, **kwargs)
1410 def inner(ax, *args, data=None, **kwargs):
1411 if data is None:
-> 1412 return func(ax, *map(sanitize_sequence, args), **kwargs)
1413
1414 bound = new_sig.bind(ax, *args, **kwargs)

~/anaconda3/lib/python3.8/site-packages/matplotlib/axes/_axes.py in pcolormesh(self, alpha, norm, cmap, vmin, vmax, shading, antialiased, *args, **kwargs)
6014 kwargs.setdefault('edgecolors', 'none')
6015
-> 6016 X, Y, C, shading = self._pcolorargs('pcolormesh', *args,
6017 shading=shading, kwargs=kwargs)
6018 coords = np.stack([X, Y], axis=-1)

~/anaconda3/lib/python3.8/site-packages/matplotlib/axes/_axes.py in _pcolorargs(self, funcname, shading, *args, **kwargs)
5527 if shading == 'flat':
5528 if (Nx, Ny) != (ncols + 1, nrows + 1):
-> 5529 raise TypeError('Dimensions of C %s are incompatible with'
5530 ' X (%d) and/or Y (%d); see help(%s)' % (
5531 C.shape, Nx, Ny, funcname))

TypeError: Dimensions of C (13, 1) are incompatible with X (2) and/or Y (13); see help(pcolormesh)

In [2]:

Expected outcome

No errors and have a properly filled colorbar.

Additional information

This method worked before v3.5.0.

Operating system

Ubuntu: 5.4.0-91-generic #102-Ubuntu SMP Fri Nov 5 16:31:28 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

Matplotlib Version

3.5.0

Matplotlib Backend

Qt5Agg

Python version

Python 3.8.12

Jupyter version

No response

Installation

conda