How do I equalize the scales of the x-axis and y-axis?

How do I create a plot where the scales of x-axis and y-axis are the same?

This equal ratio should be maintained even if I change the window size. Currently, my graph scales together with the window size.

I tried:

plt.xlim(-3, 3)
plt.ylim(-3, 3)
plt.axis('equal')

Solution

Use Axes.set_aspect in the following manner:

from matplotlib import pyplot as plt
plt.plot(range(5))
plt.xlim(-3, 3)
plt.ylim(-3, 3)
ax = plt.gca()
ax.set_aspect('equal', adjustable='box')
plt.draw()