CODEWITHSUNDEEP
pythonmatplotlibplotlegend
tripatheea
tripatheea

Reputation: 311

Shade legend line in matplotlib

I want to shade around the line in a legend, like in the picture below.

enter image description here

I tried using 'hatch' with something like the following:

handles, labels = ax0.get_legend_handles_labels()

handles[0] = mpatches.Patch(facecolor='red', edgecolor='red', alpha=1.0, linewidth=0, label="Theory (MLL)", hatch='-')

handles[i].set_facecolor('pink')

first_legend = ax0.legend(handles, labels, loc=0, frameon=0, borderpad=0.1)

ax = ax0.add_artist(first_legend)

But this causes the rectangle to have multiple lines like the following:

enter image description here

Upvotes: 4

Views: 1887

Answers (1)

Amy Teegarden
Amy Teegarden

Reputation: 3972

You can plot two handles on top of one another by putting them together in a tuple (see the bit about HandlerTuple in this guide: http://matplotlib.org/users/legend_guide.html). In addition to that, to get the line to extend to the edge of the patch, you can use a custom version of the normal line handler with marker_pad = 0.

from matplotlib import pyplot as plt 
import matplotlib.patches as mpatches
from matplotlib.legend_handler import HandlerLine2D
import numpy as np

line, = plt.plot(range(10), color = 'red')
patch = mpatches.Patch(facecolor='pink', alpha=1.0, linewidth=0)
plt.legend([(patch, line)], ["Theory"], handler_map = {line : HandlerLine2D(marker_pad = 0)} )
plt.show()

Upvotes: 6

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