如何计算 Python 中 groupby 中行计数的百分比并生成条形图

Question

我想为每个 id 计算百分比并生成条形图。

这是我的数据示例：

id  LGA        Status
1   Banyule     Referred
2   Hepburn     Referred
3   Kingston    Not Referred
4   Darebin     Not Referred
5   Darebin     Managed Externally
6   Darebin     Managed Externally
7   Mansfield   Managed Externally
8   Casey       Referred
9   Mitchell    Referred
10  Mitchell    Not Referred
11  Moreland    Referred
12  Whittlesea  Not Referred
13  Glen Eira   Not Referred
14   Dandenong  Referred
15  Hume        Not Referred
16  Hume        Managed Externally
17  Campaspe    Not Referred
18  Melbourne   Not Referred
19  Melbourne   Not Referred

我使用“groupby”函数计算了“LGA”和“Status”列的计数并生成了条形图。

示例代码；

 df['Status'].value_counts().plot(kind='bar')
 df['LGA'].value_counts().plot(kind='bar')

如果我有兴趣为相同的列绘制百分比并分别生成条形图，我不确定如何优雅地做到这一点。

预期输出：我使用 excel

得出以下输出

Status             % of Grand Total
Not Referred         58.42%
Referred             23.68%
Managed Externally   17.89%
Grand Total          100.00%

预期条形图：

如有任何帮助，我们将不胜感激。

Answer 1

我相信这就是您要找的：

temp_df = (df.groupby('Status').size().sort_values(ascending=False) / df.groupby('Status').size().sort_values(ascending=False).sum())*100
    
ax = temp_df.plot(kind='bar')
    
ax.bar_label(ax.containers[0])
        
plt.show()