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Pandas DataFrame diff() 方法

❮ DataFrame 参考


示例

查找每一行值与前一行的值之间的差异

import pandas as pd

data = [[10, 18, 11], [13, 15, 8], [9, 20, 3]]

df = pd.DataFrame(data)

print(df.diff())
自己尝试一下 »

定义和用法

diff() 方法返回一个 DataFrame,其中包含每一行值与默认情况下前一行的值之间的差异。

可以使用 periods 参数指定要与之比较的行。

如果 axis 参数设置为 axes='columns',则该方法按列而不是按行查找差异。


语法

dataframe.diff(periods, axis)

参数

periodsaxis 参数是 关键字参数

参数 描述
periods 数字 可选。指定要计算差异的行/列。默认为 1,表示前一行/列。
axis 0
1
'index'
'columns'
可选,默认为 0,指定检查差异的轴。

 返回值

包含差异的 DataFrame 对象。


❮ DataFrame 参考

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