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Remove the legend border in Matplotlib

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  • Last Updated : 29 May, 2021
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In this article, we will learn how to Remove the legend border in Matplotlib. Let’s discuss some concepts :

  • A legend is an area describing the elements of the graph. In the matplotlib library, there‚Äôs a function called legend() which is used to Place a legend on the axes.

Approach:

  1. Import Library (Matplotlib)
  2. Import / create data.
  3. Plot a chart.
  4. Add legend.
  5. Remove legend border.

Example: Here is an example with legends.

Python3




# importing packages
import numpy as np
import matplotlib.pyplot as plt
 
# create data
x = np.linspace(1, 10, 1000)
y1 = np.sin(x)
y2 = np.cos(x)
 
# plot graph
plt.plot(x, y1)
plt.plot(x, y2)
 
# add legend
plt.legend(['Sine wave', 'Cos wave'])
plt.show()


Output:

Method 1: (Using frameon = False)

Python3




# importing packages
import numpy as np
import matplotlib.pyplot as plt
 
# create data
x = np.linspace(1, 10, 1000)
y1 = np.sin(x)
y2 = np.cos(x)
 
# plot graph
plt.plot(x, y1)
plt.plot(x, y2)
 
# add legend and remove frame
plt.legend(['Sine wave', 'Cos wave'], frameon=False)
plt.show()


Output :

Method 2: (Using legend.get_frame().set_alpha(0))

Python3




# importing packages
import numpy as np
import matplotlib.pyplot as plt
 
# create data
x = np.linspace(1, 10, 1000)
y1 = np.sin(x)
y2 = np.cos(x)
 
# plot graph
plt.plot(x, y1)
plt.plot(x, y2)
 
# add legend
leg = plt.legend(['Sine wave', 'Cos wave'])
 
# set opacity equal to zero i.e; transparent
leg.get_frame().set_alpha(0)
plt.show()


Output :


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