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Pandas DataFrame std() 方法

❮ DataFrame 参考


示例

返回每列的标准差

import pandas as pd

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

df = pd.DataFrame(data)

print(df.std())
自己尝试 »

定义和用法

std() 方法计算每列的标准差。

通过指定列轴 (axis='columns'),std() 方法会按列搜索并返回每的标准差。


语法

dataframe.std(axis, skipna, ddof, numeric_only)

参数

参数是 关键字参数

参数 描述
axis 0
1
'index'
'columns'
可选,检查哪个轴,默认值为 0。
skip_na True
False
可选,默认为 True。如果结果不应跳过 NULL 值,则设置为 False
ddof 数字
可选,默认为 1。指定 Delta 自由度
numeric_only None
True
False
可选。指定是否仅检查数值。默认为 None

返回值

包含标准差的 Series

如果指定了 level 参数,则此方法将返回一个 DataFrame 对象。

此函数不会更改原始 DataFrame 对象。


❮ DataFrame 参考

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