Python: set aspect ratio of figure to 1

Question

How do I get a figure to have a 1:1 aspect ratio? I currently have the following figure

import matplotlib.pyplot as plt

circle1 = plt.Circle((0.5, 0.5), 0.2, color='r')
fig, ax = plt.subplots()
ax.add_artist(circle1)

But the x-axis is bigger than the y-axis. I tried using the command I found here :

import matplotlib.pyplot as plt

circle1 = plt.Circle((0.5, 0.5), 0.2, color='r')
fig, ax = plt.subplots()
ax.add_artist(circle1)

plt.axes().set_aspect('equal', 'datalim')

but then the circle I drew disappears.

How can I set an equal aspect ratio?

import matplotlib.pyplot as plt circle1 = plt.Circle((0.5, 0.5), 0.2, color='r') fig, ax = plt.subplots() ax.add_artist(circle1) ax.set_aspect('equal') — redhatvicky, Nov 18 '19 at 15:24
Possible duplicate of [How can I set the aspect ratio in matplotlib?](https://stackoverflow.com/questions/7965743/how-can-i-set-the-aspect-ratio-in-matplotlib) — Guimoute, Nov 18 '19 at 15:36

score 1 · Accepted Answer · answered Nov 18 '19 at 15:20

1

Add the aspect kw to your fig, ax statement:

fig, ax = plt.subplots(subplot_kw={'aspect': 1})

answered Nov 18 '19 at 15:20

mauve

2,599
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score 1 · Answer 2 · answered Nov 18 '19 at 15:33

1

If you want to change the aspect ratio of your ax at any time rather than when it's created, you can call:

ax.set_aspect("equal")

as documented here.

answered Nov 18 '19 at 15:33

Guimoute

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2
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Python: set aspect ratio of figure to 1

2 Answers2