import numpy as np import matplotlib.pyplot as plt import matplotlib.cm as cm n = 256 angle = np.linspace(0,12*2*np.pi, n) radius = np.linspace(.5,1.,n) x = radius * np.cos(angle) y = radius * np.sin(angle) plt.scatter(x,y,c = angle, cmap = cm.hsv) plt.show() // Matplotlib CB