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Python | Horizontal Hatch Spanning Plot

Here, we are going to learn about the horizontal hatch spanning plot and its Python implementation?
Submitted by Anuj Singh, on July 22, 2020

In this article, we are going to learn how to add a horizontal Hatch-spanning in matplotlib figures? Hatch Spanning can be used for setting background and also can be used for separating spaces in the plot. It is rarely used but still can be an essential technique for plotting.

The following example illustrates four possible examples for developing a basic understanding of implementation.

plt.plot(x,y, 'o', color='yellow')
plt.axhspan(ymin=40, ymax=55, hatch='/')

Python code for horizontal hatch spanning plot

import numpy as np
import matplotlib.pyplot as plt

x = np.arange(100)
y = np.random.randint(50,90,100)

#Figure 1
plt.figure()
plt.plot(x,y, 'o', color='yellow')
plt.axhspan(ymin=40, ymax=55, hatch='/')
plt.title('Horizontal Hatch-Span : Default')
plt.show()

#Figure 2
plt.figure()
plt.plot(x,y, 'o', color='yellow')
plt.axhspan(50, 55, hatch='o')
plt.axhspan(90, 120, hatch='o')
plt.title('Horizontal Hatch-Span : Dual Spannig')
plt.show()

#Figure 3
plt.figure()
plt.plot(x,y, 'o', color='y')
plt.axhspan(ymin=40, ymax=100, color='grey', hatch='+', alpha=0.3)
plt.title('Horizontal Hatch-Span : Opaque Ratio')
plt.show()

#figure 4
plt.figure()
plt.plot(x,y, 'o', color='y')
plt.ylim(30,130)
plt.axhspan(ymin=60, ymax=100, color='grey', hatch='-', alpha=0.3)
plt.title('Horizontal Hatch-Span : Opaque Ratio')
plt.show()

Output:

Output is as figure