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Data Analysis with Python——05 #85

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hsipeng opened this issue Aug 23, 2019 · 0 comments

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Data Analysis with Python python 数据分析

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hsipeng commented Aug 23, 2019

Data Analysis with Python——05

Pandas 数据规整化：清理、转换、合并、重塑

合并

pandas.merge

pd.merge(df1, df2, on='key', how='outer')

pandas.concat

pd.concat([s1, s2, s3], axis = 1, join_zxes = [['a', 'c', 'b', 'e']], keys=['one', 'two', 'three'])

数据转换

移除重复数据

duplicated 判断是否重复
drop_duplicates() 移除重复

利用函数或者映射进行数据转换
map

替换值
Replace

字符串

hsipeng added python 数据分析 Data Analysis with Python labels

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