Python基于matplotlib画箱体图检验异常值操作示例【附xls数据文件下载】

# -*- coding:utf-8 -*-
#! python3
import pandas as pd
import os
import matplotlib.pyplot as plt
data=pd.read_excel('catering_sale.xls',index_col='日期')
plt.rcParams['font.sans-serif']=['SimHei']#正常显示中文
plt.rcParams['axes.unicode_minus']=False#正常显示负号
plt.figure(figsize=(8,8))
p=data.boxplot(return_type='dict')
x=p['fliers'][0].get_xdata()
y=p['fliers'][0].get_ydata()
y.sort()
for i in range(len(x)):
  if i>0:
    plt.annotate(y[i],xy=(x[i],y[i]),xytext=(x[i]+0.05-0.8/(y[i]-y[i-1]),y[i]))
  else:
    plt.annotate(y[i],xy=(x[i],y[i]),xytext=(x[i]+0.8,y[i]))
plt.show()