雙圖形與matplotlib：屬性錯誤

Question

我有一個大熊貓數據幀是這樣的：

nan 0  ingredient contribution count 
0 0.0 cracker  0.088844873  11 
1 2.0 water   0.044386494  125 
2 3.0 oil   0.034567456  10 
3 4.0 flour   0.030855063  186 
... 

我想創建一個雙圖，看起來是這樣的：

我試過的代碼：

import matplotlib.pyplot as plt #importing libraries 
import numpy as np 

plt.figure(1) #creating empty figure 

t = np.arange(0.0, 2.0, 0.01) 

fig_contr = df[['ingredient','contribution']] #selecting columns 
fig_count = df[['ingredient','count']] 

plt.subplot(211) #creating subplot 
plt.plot(t, fig_contr) #plotting subplot 
plt.subplot(212) 
plt.plot(t, fig_count) 

但我得到這個錯誤：AttributeError的： '據幀' 對象有沒有屬性「找到

我應該如何創建我想獲得的圖形？

Answer 1

一個可能的解決方案是使用Series.plot.bar：

plt.figure(1) #creating empty figure 

df.set_index('ingredient', inplace=True) #set index from column ingredient 

fig_contr = df['contribution'] #selecting columns 
fig_count = df['count'] 

plt.subplot(211) #creating subplot 
fig_contr.plot.bar() #plotting subplot 
plt.subplot(212) 
fig_count.plot.bar() 
plt.show() 

您還可以更改軸標籤的方向X：

plt.figure(1) #creating empty figure 
df.set_index('ingredient', inplace=True) 

fig_contr = df['contribution'] #selecting columns 
fig_count = df['count'] 

plt.subplot(211) #creating subplot 
fig_contr.plot.bar(rot=0) #plotting subplot 
plt.subplot(212) 
fig_count.plot.bar(rot=0) 
plt.show()