Bug summary

tight_layout() tries to set the x/y subplot parameters independently. When using a fixed-aspect Axes, this has issues because the x/y extents of the Axes cannot be independently set.

This is the root cause of #4251, with a much simpler example below. Also possibly a duplicate of #18313, but I thought it was worth a new issue as this one has a much simpler example.

Code for reproduction

import matplotlib.pyplot as plt

fig, ax = plt.subplots()
ax.set_aspect('equal')
ax.set_ylabel('really really really really long label', rotation=0, horizontalalignment='right')

fig.tight_layout()
plt.show()

Actual outcome

Expected outcome

The long axis label is contained within the figure.

Operating system

macOS

Matplotlib Version

3.4.2.post1853+gdce40267b5.d20210907

Matplotlib Backend

MacOSX

Python version

3.9.6

Jupyter version

No response

Other libraries

No response

Installation

source

Conda channel

No response