Pandas 数据分析画饼图

图中中文显示问题由以下代码解决

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
from pylab import *
mpl.rcParams['font.sans-serif'] = ['SimHei']

导入数据

data = pd.read_excel("CQU2018.xlsx")
data.head()

提取需要的数据

df = data[data.College=="物理学院"]
df.Type.value_counts()

找到series画饼图

number = np.array(df[df.Type=="升学"].Number)
work_type = df[df.Type=="升学"].Unit
series = pd.Series(number,index=work_type,name="")
series.plot.pie(figsize=(8, 8),autopct='%.2f')