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[Bug]: Subplots display problem on MacOS #26630

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H-tr opened this issue Aug 30, 2023 · 5 comments
Closed

[Bug]: Subplots display problem on MacOS #26630

H-tr opened this issue Aug 30, 2023 · 5 comments
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GUI: MacOSX

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@H-tr
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H-tr commented Aug 30, 2023

Bug summary

One of the subplots couldn't display on screen for mac

Code for reproduction

import numpy as np
import matplotlib.pyplot as plt

Fm = 100
t1 = np.linspace(0, 0.1, 200)
y1 = np.sin(2 * np.pi * Fm * t1 + np.pi / 6)  # Sine wave

fig, (ax1, ax2) = plt.subplots(1, 2, figsize = (10, 4), constrained_layout = True)
ax1.plot(t1, y1, 'b', label='continuous')
ax1.set_title("Sine wave")
ax1.set_xlabel('time in sec')
ax1.set_ylabel('y(t)')

fs1 = int(input("Enter the sampling frequency: ")) # sampling rate
n1 = np.arange(0, 0.1 * fs1) / fs1
x1 = np.sin(2 * np.pi * Fm * n1 + np.pi / 6)
ax2.plot(n1, x1, 'b', label='discrete')
ax2.set_title("discrete time signal x(n) with fs = " + str(fs1))
ax2.set_xlabel('time in sec')
ax2.set_ylabel('x(t)')

plt.show()

Actual outcome

WechatIMG9894

Expected outcome

WechatIMG9895

Additional information

The figure is correct after saving it.

Operating system

MacOSX, Ventura 13.5

Matplotlib Version

3.7.2

Matplotlib Backend

MacOSX

Python version

3.8.17

Jupyter version

No response

Installation

pip
@timhoffm
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Does it work with other backends?

e.g. prepend

import matplotlib
matplotlib.use("TkAgg")

@H-tr
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H-tr commented Aug 30, 2023

It works on TkAgg

@greglucas
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greglucas commented Aug 30, 2023 •
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I can reproduce the error on 3.7.2, but it works with the release candidate pip install --pre matplotlib==3.8.0rc1. Are we making another 3.7 patch release and would this be worth bisecting to find what fixed it and backporting? (my inclination is to not find and backport this and the solution being to upgrade once 3.8 is out)

@timhoffm
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3.8 should be out soonish. Let's not invest extra effort here.

@H-tr H-tr closed this as completed Aug 30, 2023
@QuLogic
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QuLogic commented Aug 30, 2023

I can reproduce the error on 3.7.2, but it works with the release candidate pip install --pre matplotlib==3.8.0rc1. Are we making another 3.7 patch release and would this be worth bisecting to find what fixed it and backporting? (my inclination is to not find and backport this and the solution being to upgrade once 3.8 is out)

I do plan to do 3.7.3 by the beginning of next week (or preferably end of this one), regardless of if we can figure out #26463, so if you want to go look, you can, but it'd have to be fixed rather quickly

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@QuLogic @timhoffm @greglucas @H-tr