How to add a title to a Matplotlib legend?

Prerequisites: Matplotlib

In this article, we will see how can we can add a title to a legend in our graph using matplotlib, Here we will take two different examples to showcase our graph.

Approach:

• Import required module.
• Create data.
• Add a title to a legend.
• Normally plot the data.
• Display plot.

Below is the Implementation:

Example 1:

In this example, we will draw different lines with the help of matplotlib and Use the title argument to plt.legend() to specify the legend title.

Python3

# importing package
import matplotlib.pyplot as plt
import numpy as np

# create data
X = [1, 2, 3, 4, 5]

# plot lines
plt.plot(X, np.sin(X), label = "Curve-1")
plt.plot(X, np.cos(X), label = "Curve-2")

# Add a title to a legend
plt.legend(title = "Legend Title")
plt.title("Line Graph - Geeksforgeeks")

plt.show()

Output:

Example 2:

In this example, we will draw a Bar Graph with the help of matplotlib and Use the title argument to plt.legend() to specify the legend title.

Python3

# importing package
import matplotlib.pyplot as plt

# sample code
plt.bar([1, 2, 3], [16, 4, 1],
        color ='yellow',
        label = 'Label 2')

plt.bar([4, 5], [2, 4],
        label = 'Label 1')

# Add a title to a legend
plt.legend(title = "Variation Rate")

plt.title("Line Graph - Geeksforgeeks")

plt.show()

Output: