In this article, we will see how can we can change the background color of a legend in our graph using MatplotLib, Here we will take two different examples to showcase different background colors of a legend in our graph.
Requirements:
pip install matplotlib
Approach:
- Import required module.
- Create data.
- Change the background color of a legend.
- Normally plot the data.
- Display plot.
Implementation:
Example 1:
In this example, we will draw different lines with the help of matplotlib and Use the facecolor argument to plt.legend() to specify the legend background color.
Python3
# importing package import matplotlib.pyplot as plt import numpy as np # create data X = [1,2,3,4,5] Y = [3,3,3,3,3] # plot lines plt.plot(X, Y, label = "Line-1") plt.plot(Y, X, label = "Line-2") plt.plot(X, np.sin(X), label = "Curve-1") plt.plot(X, np.cos(X), label = "Curve-2") #Change the background color of a legend. plt.legend(facecolor="gray") plt.title("Line Graph - GeeksforLazyroar") plt.show() |
Output:
Example 2:
In this example, we will draw a Vertical line with the help of matplotlib and Use the facecolor argument to plt.legend() to specify the legend background color.
Python3
# importing package import matplotlib.pyplot as plt #Create data and plot lines. plt.plot([0, 1], [0, 2.0], label='Label-1') plt.plot([1, 2], [0, 2.1], label='Label-2') plt.plot([2, 3], [0, 2.2], label='Label-3') #Change the background color of a legend. plt.legend(facecolor="pink") plt.title("Line Graph - GeeksforLazyroar") plt.show() |
Output:
