How to Add a Horizontal Line to an Existing Plot?

Generate a Horizontal Line on an Existing Plot

Question: Enhance an existing plot by incorporating a horizontal line.

Solution:

To include a horizontal line on your plot, utilize axhline, which represents a horizontal line on the x-axis. This versatile function enables you to customize the line's position, color, and style.

For instance, to plot a horizontal line at y = 0.5, your code would look like this:

import matplotlib.pyplot as plt

# Plot the horizontal line
plt.axhline(y=0.5, color='r', linestyle='-')

# Display the plot
plt.show()

Here's an illustration of the resulting figure:

[Image of a sample figure with a horizontal line at y = 0.5]

By leveraging the capabilities of axhline, you can effortlessly enhance your plots with horizontal lines, adding clarity and depth to your visualizations.

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