"""Simple demo of a scatter plot."""importnumpyasnpimportmatplotlib.pyplotaspltN=50x=np.random.rand(N)y=np.random.rand(N)colors=np.random.rand(N)area=np.pi*(15*np.random.rand(N))**2# 0 to 15 point radiiplt.scatter(x,y,s=area,c=colors,alpha=0.5)plt.show()