DataFrame.expanding()

pandas.DataFrame.expanding

DataFrame.expanding(min_periods=1, freq=None, center=False, axis=0)

Provides expanding transformations.

New in version 0.18.0.

Parameters:

Parameters:	min_periods : int, default None Minimum number of observations in window required to have a value (otherwise result is NA). freq : string or DateOffset object, optional (default None) (DEPRECATED) Frequency to conform the data to before computing the statistic. Specified as a frequency string or DateOffset object. center : boolean, 登录查看完整内容 ← → Copyright©2021 w3cschool编程狮\|闽ICP备15016281号-3\|闽公网安备35020302033924号违法和不良信息举报电话：173-0602-2364\|举报邮箱：jubao@eeedong.com 意见反馈 X 意见反馈：联系方式：查看完整版笔记违规举报 X 广告等垃圾信息不友善内容违反法律法规的内容不宜公开讨论的政治内容其他

min_periods : int, default None

Minimum number of observations in window required to have a value (otherwise result is NA).

freq : string or DateOffset object, optional (default None) (DEPRECATED)

Frequency to conform the data to before computing the statistic. Specified as a frequency string or DateOffset object.

center : boolean,