import pandas as pd# 正态分布# 3sigma准则 ---> # mean() - 3* std() ---下限# mean() + 3* std() ---上限# 自实现3sigma 原则def three_sigma(ser): """ 自实现3sigma 原则 :param ser: 数据 :return: 处理完成的数据 """ bool_id = ((ser.mean() - 3 * ser.std()) <= ser) & (ser <= (ser.mean() + 3 * ser.std())) # bool数组索引 # ser[bool_id] return ser.index[bool_id]#使用detail 验证deatil = pd.read_excel("./meal_order_detail.xlsx")print(deatil.shape)# 调用3sigma原则，进行异常值过滤index_name_list = three_sigma(deatil['amounts'])deatil = deatil.loc[index_name_list,:]print(deatil.shape)#percentile() 计算分位数# np.percentile() ql-1.5iqr qu + 1.5iqr