How to make hollow square marks with Matplotlib in Python?

To make hollow square marks with Matplotlib, we can use marker 'ks', markerfacecolor='none', markersize=15, and markeredgecolor='red'.

Steps

• Create x and y data points using NumPy.

• Create a figure and add an axes to the figure as part of a subplot arrangement.

• Plot x and y data points using plot() method. To make hollow square marks, use marker "ks", markerfacecolor="none", markersize=15, and markeredgecolor="red".

• Display the figure using show() method.

Example

Here's how to create hollow square markers ?

import numpy as np
from matplotlib import pyplot as plt

plt.rcParams["figure.figsize"] = [7.00, 3.50]
plt.rcParams["figure.autolayout"] = True

x = np.linspace(-2, 2, 10)
y = np.sin(x)

fig = plt.figure()
ax1 = fig.add_subplot(111)
ax1.plot(x, y, 'ks', markerfacecolor='none', ms=15, markeredgecolor='red')
plt.show()

Marker Parameters

The key parameters for creating hollow squares are ?

Customization Options

You can customize the hollow squares further ?

import numpy as np
from matplotlib import pyplot as plt

x = np.linspace(0, 10, 8)
y = x**0.5

plt.figure(figsize=(8, 4))
plt.plot(x, y, 'ks', markerfacecolor='none', ms=20, 
         markeredgecolor='blue', markeredgewidth=2)
plt.title('Customized Hollow Square Markers')
plt.xlabel('X-axis')
plt.ylabel('Y-axis')
plt.grid(True, alpha=0.3)
plt.show()

Conclusion

Use marker 'ks' with markerfacecolor='none' to create hollow square markers. Adjust markersize and markeredgecolor to customize appearance and visibility.