Bug summary

Hi everyone,

I somehow created a plot in unorthodox order, i.e. first plot some data in the second column, then in the first one. To generate my plots, I call a method that automatically

• clears the axes
• sets the scale
• sets the limits
• plots the data

In this case two warnings are issued. The code of the minimal example reproduces this behavior. When changing it to the second variant in the code block (first plotting the first column, then the second column) the issue disappears.

Thank you!

Best

Francesco

Code for reproduction

import numpy as np
from matplotlib import pyplot as plt


# ISSUE ARISES IN THIS VARIANT
fig, ax = plt.subplots(1, 2, sharey=True)


ax[1].scatter(np.random.randint(1, 100, 100), np.random.randint(1, 100, 100))
ax[1].set_yscale("log")
ax[1].set_ylim([1e0, 1e2])

ax[0].clear()
ax[0].scatter(np.random.randint(1, 100, 100), np.random.randint(1, 100, 100))

plt.show()

# NO ISSUE IN THE VARIANT BELOW
import numpy as np
from matplotlib import pyplot as plt


fig, ax = plt.subplots(1, 2, sharey=True)


ax[0].scatter(np.random.randint(1, 100, 100), np.random.randint(1, 100, 100))
ax[0].set_yscale("log")
ax[0].set_ylim([1e0, 1e2])

ax[1].clear()
ax[1].scatter(np.random.randint(1, 100, 100), np.random.randint(1, 100, 100))

plt.show()

Actual outcome

FutureWarning: Attempt to set non-positive ylim on a log-scaled axis will be ignored.
FutureWarning: Attempting to set identical low and high ylims makes transformation singular; automatically expanding.

Expected outcome

No warning is issued

Additional information

No response

Operating system

Windows

Matplotlib Version

3.10.0

Matplotlib Backend

module://matplotlib_inline.backend_inline

Python version

3.11.11

Jupyter version

No response

Installation

pip