MatPlotLib's ion() and draw() not working

Question

I am trying to plot figures in real time using a for loop. I have the following simple code:

import matplotlib.pyplot as plt

plt.ion()
plt.figure()
for i in         


        

Answer 1

Hey I was having the same problem, I checked other questions and my issue was solved when I plugged a pause into my solution. Here's some example code that worked for me.

import matplotlib.pyplot as plt
import numpy as np
plt.ion()
x = np.arange(0, 4*np.pi, 0.1)
y = [np.sin(i) for i in x]
plt.plot(x, y, 'g-', linewidth=1.5, markersize=4)
plt.pause(0.0001)         
plt.plot(x, [i**2 for i in y], 'g-', linewidth=1.5, markersize=4)
plt.pause(0.0001)
plt.plot(x, [i**2*i+0.25 for i in y], 'r-', linewidth=1.5, markersize=4) 
plt.pause(0.0001)

The solution was posted here: Matplotlib ion() and subprocesses