调整 matplotlib RadioButtons 字体大小

Question

I wonder if anyone has an advice on how to adjust the font size on the RadiouButtons side text. Taking the widget example from matplotlib

import numpy as np
import matplotlib.pyplot as plt
from matplotlib.widgets import RadioButtons

t = np.arange(0.0, 2.0, 0.01)
s0 = np.sin(2*np.pi*t)
s1 = np.sin(4*np.pi*t)
s2 = np.sin(8*np.pi*t)

fig, ax = plt.subplots()
l, = ax.plot(t, s0, lw=2, color='red')
fig.subplots_adjust(left=0.3)

axcolor = 'lightgoldenrodyellow'
rax = fig.add_axes([0.05, 0.7, 0.15, 0.15], facecolor=axcolor)
radio = RadioButtons(rax, ('2 Hz', '4 Hz', '8 Hz'))


def hzfunc(label):
    hzdict = {'2 Hz': s0, '4 Hz': s1, '8 Hz': s2}
    ydata = hzdict[label]
    l.set_ydata(ydata)
    plt.draw()
radio.on_clicked(hzfunc)

rax = fig.add_axes([0.05, 0.4, 0.15, 0.15], facecolor=axcolor)
radio2 = RadioButtons(rax, ('red', 'blue', 'green'))


def colorfunc(label):
    l.set_color(label)
    plt.draw()
radio2.on_clicked(colorfunc)

rax = fig.add_axes([0.05, 0.1, 0.15, 0.15], facecolor=axcolor)
radio3 = RadioButtons(rax, ('-', '--', '-.', ':'))


def stylefunc(label):
    l.set_linestyle(label)
    plt.draw()
radio3.on_clicked(stylefunc)

plt.show()

How could I make "2Hz, 4Hz, 8Hz" larger?

It is possible to adjust the buttons size by accessing the Circle objects on the RadioButtons . Is there something similar to the font size? (the buttons widget have the .label.set_fontsize() attribute but I have not found a similar thing for this widget)

Answer 1

In order to change the font size of the RadioButton labels you need to access the properties of the individual label:

for r in radio.labels: r.set_fontsize(16)