I really like the "explode" option on matplotlib pie charts. I was hoping to be able to "explode in groups". I'm plotting lots of little slices that fall into 3 or 4 categories. I'd like to explode all the little slices together, as groups.
I figure that's not entirely clear, so I have called upon my sorely lacking ability to draw basic shapes and made this picture showing what I'm trying to do:
Please note the little unshaded gaps between the groups.
Is this possible?
Thanks a lot, Alex
Here is a more stand-alone version of @Jakob's answer, changing the wedges in-place, and to also move labels and percentages:
import numpy as np
import matplotlib.pyplot as plt
fig, ax = plt.subplots()
ax.set_aspect('equal')
data = np.random.uniform(1, 3, 7)
wedges, texts, percs = ax.pie(data, labels=['Alkaid', 'Mizar', 'Alioth', 'Megrez', 'Phecda', 'Merak', 'Dubhe'],
autopct="%1.1f%%")
groups = [[0, 1, 2], [3, 4], [5, 6]]
radfraction = 0.1
for group in groups:
ang = np.deg2rad((wedges[group[-1]].theta2 + wedges[group[0]].theta1) / 2)
for j in group:
center = radfraction * wedges[j].r * np.array([np.cos(ang), np.sin(ang)])
wedges[j].set_center(center)
texts[j].set_position(np.array(texts[j].get_position()) + center)
percs[j].set_position(np.array(percs[j].get_position()) + center)
ax.autoscale(True)
plt.show()
