Square plot in a meshgrid in Python

Question

I want to plot multiple squares of size 1x1 using meshgrid. The current and expected outputs are presented.

import numpy as np
import matplotlib.pyplot as plt
X = np.array([0,1,2])
Y = np.array([0, -1, -2])
xx, yy = np.meshgrid(X,Y)
plt.plot(xx, yy,"s")
plt.show()

The current output is

The expected output is

The style "s" is for square bullet not for tracing grid. If you aim to draw squares you need to provide coordinate of them in right order using Patches or tracing vertical and horizontal lines using axhline and axvline. — jlandercy
– jlandercy, Commented Jul 2, 2022 at 14:55

blunova · Accepted Answer · 2022-07-02 21:30:05Z

1

I try to suggest the following solution. Given the assumption that we have 1x1 squares, meshgrid is not necessary:

import numpy as np
import matplotlib.pyplot as plt

fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)

X = np.array([0, 1, 2])
Y = np.array([0, -1, -2])

x_sorted = np.sort(X)
y_sorted = np.sort(Y)

ax.set_xticks(x_sorted)
ax.set_yticks(y_sorted)

ax.set_xlim(x_sorted[0], x_sorted[-1])
ax.set_ylim(y_sorted[0], y_sorted[-1])

ax.grid()

ax.set_aspect('equal', 'box')

plt.show()

answered Jul 2, 2022 at 21:30

blunova

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