Online Plotting with Matplotlib

online_plot_matplotlib.py

import matplotlib.pyplot as plt
import numpy as np

from collections import deque

plt.figure()
ax = plt.subplot(1,1,1)
plt.ylim([-1.1, 1.1])
plt.xlim([0, 50])

# data
data = deque([0]*50, maxlen=50)
lines = plt.plot(data)
for i in range(1000):
    new = 2 * np.random.rand() - 1
    data.append(new)
    
    # Plotting
    lines[0].set_ydata(data)
    plt.pause(0.1) # drawing

Requirements: matplotlib, numpy