AttributeError: module 'matplotlib.mlab' has no attribute 'normpdf'

AttributeError: module ‘matplotlib.mlab’ has no attribute ‘normpdf’

在练习直方图时报错：

Traceback (most recent call last):

  File "F:\Studing\Python\Anaconda\未命名0.py", line 20, in <module>
    y = mlab.normpdf(bins,mu,sigma)

AttributeError: module 'matplotlib.mlab' has no attribute 'normpdf'

源代码：（基于Python的大数据分析基础及实战一书P188）

import numpy as np
import matplotlib.mlab as mlab
import matplotlib.pyplot as plt

mu = 100
sigma = 15
x = mu + sigma * np.random.randn(10000)
print("x:",x.shape)
num_bins = 50
n, bins, patches = plt.hist(x,num_bins,normed=1,facecolor='green',alpha=0.5)

y = mlab.normpdf(bins,mu,sigma)

plt.plot(bins,y,'r--')
plt.xlabel('Smarts')
plt.ylabel('Prbability')

plt.title('Histogram of IQ:$\mu=100$,$\sigma=15$')

plt.subplots_adjust(left=0.15)
plt.show()
print("bind:\n",bins)

主要是在y = mlab.normpdf(bins,mu,sigma)这句，mlab中没有了normpdf；经百度找到替代方法，使用scipy.stats.norm.pdf以完成绘制：
修改后代码：

import numpy as np
from scipy import stats  #此处新增
import matplotlib.pyplot as plt

mu = 100
sigma = 15
x = mu + sigma * np.random.randn(10000)
print("x:",x.shape)
num_bins = 50
n, bins, patches = plt.hist(x,num_bins,normed=1,facecolor='green',alpha=0.5)

y = stats.norm.pdf(bins,mu,sigma) #此处有修改

plt.plot(bins,y,'r--')
plt.xlabel('Smarts')
plt.ylabel('Prbability')

plt.title('Histogram of IQ:$\mu=100$,$\sigma=15$')

plt.subplots_adjust(left=0.15)
plt.show()
print("bind:\n",bins)

本文链接：https://editor.csdn.net/md?articleId=105952579

参考文章：https://blog.csdn.net/salmonwilliam/article/details/103365244