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# 导入第三方包 import pandas as pd import numpy as np
a.isnull().sum() miss_v = income.isnull()#查看缺失值位置 l_miss = income[miss_v.any(axis=1)]#查看缺失值所在行
var_1 = std(a.iloc[:,1])
a_1 = a.dropna()# 删除含有缺失值的样本(行) a1.head(3)#查看前三行 a1.shape a2 = a.dropna(axis=1)# 删除含有缺失值的特征(列) a2.head(3) a2.shape a3 = a.dropna(subset=['zhiding'])# 删除指定特征上有缺失的样本(这里'zhiding'为指定特征) a3.head(3) a3.shape
a4 = a.fillna(value = {'zhiding':a.zhiding.mode()[0], 'op':a.occupation.mode()[0], 'pp':a['a-p'].mode()[0]}, inplace = False)
a4.isnull().sum() #补充:若是用0替换 a5 = a.fillna(0) #根据数据状况使用 a5.isnull().sum()
a6 = pd.read_excel('a.xlsx') a6.isnull().sum()
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