How do I plot in real-time in a while loop?

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Here’s the working version of the code in question (requires at least version Matplotlib 1.1.0 from 2011-11-14):

import numpy as np
import matplotlib.pyplot as plt

plt.axis([0, 10, 0, 1])

for i in range(10):
    y = np.random.random()
    plt.scatter(i, y)
    plt.pause(0.05)

plt.show()

Note the call to plt.pause(0.05), which both draws the new data and runs the GUI’s event loop (allowing for mouse interaction).

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