15 Feb Add a Matplotlib Legend in a Graph
A legend in a graph is a box on the left and right displaying the data from the columns. Legend generally helps the readers in understanding the graph.
Here is what a legend looks like in a graph:
The legend() function is used to create a legend in Matplotlib.
Let us now see a complete example of legends in a graph in Matplotlib. We have plotted the frequencies of a signal in this example:
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import numpy as np import matplotlib.pyplot as plt # Data a = np.arange(5) b = [2,4,6,8,10] c = [5, 6, 7, 8, 9] # Create plots fig = plt.figure() ax = plt.subplot() ax.plot(a, b, 'k--', label='Frequency') ax.plot(a, c, 'k:', label='Periods') # Create a legend using the Matplotlib Axes.legend() method in Python ax.legend() # Plot Title plt.title("Frequency of a Signal") # Display plt.show() |
Output
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