.. _api-scatter_piecharts: api example code: scatter_piecharts.py ====================================== .. plot:: /home/tcaswell/src/p/matplotlib/doc/mpl_examples/api/scatter_piecharts.py :: """ =================================== Scatter plot with pie chart markers =================================== This example makes custom 'pie charts' as the markers for a scatter plot. Thanks to Manuel Metz for the example """ import math import numpy as np import matplotlib.pyplot as plt # first define the ratios r1 = 0.2 # 20% r2 = r1 + 0.4 # 40% # define some sizes of the scatter marker sizes = [60, 80, 120] # calculate the points of the first pie marker # # these are just the origin (0,0) + # some points on a circle cos,sin x = [0] + np.cos(np.linspace(0, 2*math.pi*r1, 10)).tolist() y = [0] + np.sin(np.linspace(0, 2*math.pi*r1, 10)).tolist() xy1 = list(zip(x, y)) s1 = max(max(x), max(y)) # ... x = [0] + np.cos(np.linspace(2*math.pi*r1, 2*math.pi*r2, 10)).tolist() y = [0] + np.sin(np.linspace(2*math.pi*r1, 2*math.pi*r2, 10)).tolist() xy2 = list(zip(x, y)) s2 = max(max(x), max(y)) x = [0] + np.cos(np.linspace(2*math.pi*r2, 2*math.pi, 10)).tolist() y = [0] + np.sin(np.linspace(2*math.pi*r2, 2*math.pi, 10)).tolist() xy3 = list(zip(x, y)) s3 = max(max(x), max(y)) fig, ax = plt.subplots() ax.scatter(np.arange(3), np.arange(3), marker=(xy1, 0), s=[s1*s1*_ for _ in sizes], facecolor='blue') ax.scatter(np.arange(3), np.arange(3), marker=(xy2, 0), s=[s2*s2*_ for _ in sizes], facecolor='green') ax.scatter(np.arange(3), np.arange(3), marker=(xy3, 0), s=[s3*s3*_ for _ in sizes], facecolor='red') plt.show() Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)