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Get the legend as a separate picture in Matplotlib
To get the legend as a separate picture, we can take the following steps −
Create x and y points using numpy.
Using the figure() method, create a new figure, or activate an existing figure for Line plot and Legend plot figures.
Add an '~.axes.Axes' to the figure as part of a subplot arrangement, using the add_subplot() method at nrow=1, ncols=1 and at index=1.
Create line1 and line2 using x, y and y1 points.
Place the legend for line1 and line2, set ordered labels, put at center location.
Save the figure only with legend using the savefig() method.
Example
import numpy as np
from matplotlib import pyplot as plt
x = np.linspace(1, 100, 1000)
y = np.log(x)
y1 = np.sin(x)
fig = plt.figure("Line plot")
legendFig = plt.figure("Legend plot")
ax = fig.add_subplot(111)
line1, = ax.plot(x, y, c="red", lw=4, linestyle="dashdot")
line2, = ax.plot(x, y1, c="green", lw=1, linestyle="--")
legendFig.legend([line1, line2], ["y=log(x)", "y=sin(x)"], loc='center')
legendFig.savefig('legend.png')Output
Updated on: 10-Apr-2021
3K+ Views
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