How to handle an asymptote/discontinuity with Matplotlib?

To handle an asymptote/discontinuity with matplotlib, we can take the following steps −

Create x and y data points using numpy.
Turn off the axes plot.
Plot the line with x and y data points.
Add a horizontal line across the axis, x=0.
Add a vertical line across the axis, y=0.
Place legend for the curve y=1/x.
To display the figure, use show() method.

Example

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(-1, 1, 100)
y = 1 / x
plt.axis('off')
plt.plot(x, y, label='y=1/x')
plt.axhline(y=0, c='red')
plt.axvline(x=0, c='red')
plt.legend(loc='upper left')
plt.show()

Output

Rishikesh Kumar Rishi

Updated on: 11-May-2021

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