Spyder is not displaying Matplotlib Plot inline

Problem Description

Not able to display Matplotlib plot inline in Spyder.

What steps reproduce the problem?

Running the follow ing Python program in Spyder:

“”" Spyder Editor

This is a temporary script file. “”"

import matplotlib.pyplot as plt
import numpy as np

plt.switch_backend('QT5Agg')
plt.style.use("ggplot")

t = np.arange(0.0, 2.0, 0.1)
s = np.sin(2 * np.pi * t)
s2 = np.cos(2 * np.pi * t)
plt.plot(t, s, "o-", lw=4.1)
plt.plot(t, s2, "o-", lw=4.1)
plt.xlabel("time (s)")
plt.ylabel("Voltage (mV)")
plt.title("Simple plot $\\frac{\\alpha}{2}$")
plt.grid(True)

plt.savefig("test.png")

plt.show()

What is the expected output? What do you see instead?

I expected to see my plot inline in Spyder, I get the plot in a separate Python window. See below:

### Paste Traceback/Error Below (if applicable)

IPython console displayed:
Python 3.8.1 (default, Jan  8 2020, 16:15:59) 
Type "copyright", "credits" or "license" for more information.

IPython 7.20.0 -- An enhanced Interactive Python.

runfile('/Users/user/temp.py', wdir='/Users/user')

Versions

• Spyder version: 4.2.1
• Python version: 3.8.5
• Qt version: 5.9.7
• PyQt version: 5.9.2
• Operating System name/version: Mac OS X, Big Sur (11.2)

Dependencies

N/A

[OrbitalMechanic]

Thank you. Between commenting out plt.switch_backend( ‘QT5Agg’ ), setting Backend to Inline and restarting the kernel did the trick. I appreciate the help from all the contributors to this thread.

Sam Dupree.

On February/10/2021 00:06:59, Carlos Cordoba wrote:

Hey @OrbitalMechanic https://github.com/OrbitalMechanic, thanks for reporting. You’re changing the backend to Qt in this line of the code you posted above:

plt.switch_backend(‘QT5Agg’)

so that’s why you’re not getting inline plots in Spyder. If you comment it, you’ll see your plot in the Plots pane.

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[ccordoba12]

Hey @OrbitalMechanic, thanks for reporting. You’re changing the backend to Qt in this line of the code you posted above:

plt.switch_backend('QT5Agg')

so that’s why you’re not getting inline plots in Spyder. If you comment it, you’ll see your plot in our Plots pane.