Ipython - 从系列旁边的系列表绘制饼图

Question

我在Ipython笔记本中有一个matplotlib饼图，旁边贴有plt.text系列表。问题是表格被编组为系列输出，而不是一个很好的表格。我做错了什么？

sumByGroup = df['dollar charge'].groupby(df['location']).sum().astype('int')

sumByGroup.plot(kind='pie', title='DOLLARS', autopct='%1.1f%%')
plt.axis('off')
plt.text(2, -0.5, sumByGroup, size=12)

Answer 1

我认为问题在于你在df['dollar change']而不是df整体上调用groupby。试试这个，

sumByGroup = df.groupby(df['location']).sum().astype('int')

sumByGroup.plot(y='dollar charge', kind='pie', title='DOLLARS', autopct='%1.1f%%')
plt.axis('off')
plt.text(2, -0.5, sumByGroup, size=12)

包含数据的完整工作示例。

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt


n = 20
locations = ['MD', 'DC', 'VA', 'NC', 'NY']

df = pd.DataFrame({'dollar charge': np.random.randint(28, 53, n),
                   'location': np.random.choice(locations, n),
                   'Col A': np.random.randint(-5, 5, n),
                   'Col B': np.random.randint(-5, 5, n)})

sumByGroup = df.groupby(df['location']).sum()

fig, ax = plt.subplots()

sumByGroup.plot(y='dollar charge', kind='pie', title='DOLLARS',
                autopct='%1.1f%%', legend=False, ax=ax)
ax.axis('off')
ax.text(2, -0.5, sumByGroup, size=12)
ax.set_aspect('equal')