Type shift-enter to execute the code below
In [6]:
%pylab inline
N = 200
r = 2 * rand(N)
theta = 2 * pi * rand(N)
area = 200 * r ** 2 * rand(N)
ax = plt.subplot(111, polar=True)
scatter(theta, r, c=theta, s=area, alpha=0.75)
Out[6]: