python 绘制堆积柱状图

1.原理
https://blog.csdn.net/m0_48405781/article/details/108420697

Axes.bar(self, x, height, width=0.8, bottom=None, *, align=’center’, data=None, **kwargs)

在绘制堆积图时，是在前一个的基础上累加的，即需要设置bottom参数。
举例：

import numpy as np
import matplotlib.pyplot as plt
  
  
labels = ['Month1', 'Month2', 'Month3', 'Month4']
mine = [21, 52, 33, 54]
others = [54, 23, 32, 41]
Mine_std = [2, 3, 4, 1]
Others_std = [3, 5, 2, 3]
width = 0.3
  
fig, ax = plt.subplots()
  
ax.bar(labels, mine, width, 
       yerr = Mine_std, 
       label ='Mine')
  
ax.bar(labels, others, width, 
       yerr = Others_std,
       bottom = mine,
       label ='Others')
  
ax.set_ylabel('Articles')
ax.legend()
  
ax.set_title('matplotlib.axes.Axes.bar Example')
  
plt.show()

其中第二个ax.bar（）参数设置bottom = mine即可。