python

超轻量级php框架startmvc

对pandas里的loc并列条件索引的实例讲解

更新时间:2020-06-12 14:48:01 作者:startmvc
如下所示:defFamily_feature(df):df['Fam_Size']=df['SibSp']+df['Parch']df['Fam_Size'].loc[df['Fam_Size']==0]=1df['Fa

如下所示:


def Family_feature(df):
 df['Fam_Size'] =df['SibSp']+df['Parch']
 df['Fam_Size'].loc[df['Fam_Size'] == 0] = 1
 df['Fam_Size'].loc[(df['Fam_Size'] > 1) & (df['Fam_Size'] <= 3)] = 2
# df['Fam_Size'].loc[df['Fam_Size'] == 2] = 2
# df['Fam_Size'].loc[df['Fam_Size'] == 3] = 2
 df['Fam_Size'].loc[df['Fam_Size'] > 3] = 3
 return df 

df['Fam_Size'].loc[(df['Fam_Size'] > 1) & (df['Fam_Size'] <= 3)] = 2 只要中间加一个 & 符号 , 然后把两边的condition括号起来就行。

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pandas loc 条件索引