import numpy as npimport matplotlib.pyplot as pltN = 20theta = np.linspace(0.0, 2 * np.pi, N, endpoint=False)radii = 10 * np.random.rand(N)width = np.pi / 4 * np.random.rand(N)ax = subplot(111, polar=True)bars = ax.bar(theta, radii, width=width, bottom=0.0)for r, bar in zip(radii, bars): bar.set_facecolor(plt.cm.jet(r / 10.)) bar.set_alpha(0.5)plt.show()


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