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pythonnumpygeometrygridcell

How to show the grid in python with squared cells?

I want to plot a circle on a grid in python. I just need python to show the grid with squared cells. I wrote the following code, but it shows the grid with NON-squared cells.

Can anyone tell me how to make the grid cells be squared ?

enter image description here

import matplotlib.pyplot as plt
import math

p=8

R=0.484*p

t=np.linspace(0, 2*np.pi)

x=R*np.cos(t)
y=R*np.sin(t)

plt.axis("equal")

plt.grid(True, which='both', axis='both')

plt.plot(x,y)
plt.show()
Solution

  • Remove plt.axis("equal") and instead set plt.gca().set_aspect('equal'), which precisely sets the ratio of y-unit to x-unit of the axis scaling:

    plt.grid(True, which='both', axis='both')
plt.plot(x,y)
plt.gca().set_aspect("equal")
plt.show()

    Which would be the same as setting plt.axis('square').

    Note that as mentioned in the docs, plt.axis("equal") is equal to setting plt.gca().set_aspect('equal', adjustable='datalim'), which will not produce the expected output, since data limits may not be respected in this case.

    The above will give:

    enter image description here