Plotting Horizontal Lines in Matplotlib with Pyplot

Using 'axhline' method, we can draw horizontal line on a plot

Example

plot.axhline(y=100, color='green', label=f'Horizontal Line at y=100')

Above statement draws a horizontal line at y = 100, and applies green color to it.

 

Find the below working applicaiton.

 

horizontal_line.py

import matplotlib.pyplot as plot
import numpy as np

# Sample data
x = np.arange(1, 100)
y = 10 * x + 123


# Plot the data points
plot.plot(x, y, label='y=10x+123')

mean = np.mean(y)
plot.axhline(y=mean, color='green', label=f'Horizontal Line at y={mean}')
text = f'This is y={mean}'
plot.text(30, mean + 10, text, color='red', fontsize=12, ha='center')

# Set labels and legend
plot.legend()

# Show the plot
plot.show()

Output

 

  

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