How to make an axes occupy multiple subplots with pyplot

You can simply do:

import numpy as np
import matplotlib.pyplot as plt

x = np.arange(0, 7, 0.01)
    
plt.subplot(2, 1, 1)
plt.plot(x, np.sin(x))
    
plt.subplot(2, 2, 3)
plt.plot(x, np.cos(x))
    
plt.subplot(2, 2, 4)
plt.plot(x, np.sin(x)*np.cos(x))

i.e., the first plot is really a plot in the upper half (the figure is only divided into 2×1 = 2 cells), and the following two smaller plots are done in a 2×2=4 cell grid.
The third argument to subplot() is the position of the plot inside the grid (in the direction of reading in English, with cell 1 being in the top-left corner):
for example in the second subplot (subplot(2, 2, 3)), the axes will go to the third section of the 2×2 matrix i.e, to the bottom-left corner.

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