subtitles_in_legend - GitPress.io

Example Python program subtitles_in_legend.py

Modules

import matplotlib.text as mtext
import matplotlib.pyplot as plt

Classes

class LegendTitle(object):

Methods

def init(self, text_props=None):
def legend_artist(self, legend, orig_handle, fontsize, handlebox):

Code

Python example

# Adapted to python3 from the accepted answer on https://stackoverflow.com/questions/38463369/subtitles-within-matplotlib-legend
# Legend guide: https://matplotlib.org/3.1.0/tutorials/intermediate/legend_guide.html


import matplotlib.text as mtext

class LegendTitle(object):
    def __init__(self, text_props=None):
        self.text_props = text_props or {}
        super(LegendTitle, self).__init__()

    def legend_artist(self, legend, orig_handle, fontsize, handlebox):
        x0, y0 = handlebox.xdescent, handlebox.ydescent
        title = mtext.Text(x0, y0, orig_handle, usetex=True, **self.text_props)
        handlebox.add_artist(title)
        return title



if __name__ == "__main__":

    import matplotlib.pyplot as plt

    # Plots
    fig, ax = plt.subplots()
    ax.plot(range(10), label='Staff')
    ax.plot(range(10, 0, -1), 'o', color='red', label='More Staff')


    # Legend
    handles, labels = ax.get_legend_handles_labels()

    handles.insert(0, 'Title 1')
    labels.insert(0, '')

    handles.insert(2, 'Title 2')
    labels.insert(2, '')

    ax.legend(handles, labels, handler_map={str: LegendTitle({'fontsize': 14})})


    # Show
    plt.show()

Useful Links

Articles: https://python-commandments.org/
Python shell: https://bsdnerds.org/learn-python/
Tutorial: https://pythonprogramminglanguage.com/