python3画直方图出现“Polygon‘ object has no property ‘normed”
直方图原程序importnumpyasnpimportmatplotlib.pyplotaspltnp.random.seed(0)mu,sigma=100,20#均值和标准差a=np.random.normal(mu,sigma,size=100)plt.hist(a,20,normed=1,histtype='stepfilled',facecolor='b',alpha=0.75)plt.t