pandas DataFrame日期索引的偏移日期 [英] Offset date for a Pandas DataFrame date index

问题描述

给出如下创建的Pandas数据框:

Given a Pandas dataframe created as follows:

dates = pd.date_range('20130101',periods=6)
df = pd.DataFrame(np.random.randn(6),index=dates,columns=list('A'))

                  A
2013-01-01   0.847528
2013-01-02   0.204139
2013-01-03   0.888526
2013-01-04   0.769775
2013-01-05   0.175165
2013-01-06  -1.564826

我想为索引增加15天. 这不起作用>

I want to add 15 days to the index. This does not work>

#from pandas.tseries.offsets import *
df.index+relativedelta(days=15)
#df.index + DateOffset(days=5)

TypeError: relativedelta(days=+15)

我似乎无能为力对索引做任何事情....

I seem to be incapable of doing anything right with indexes....

推荐答案

，您可以使用 DateOffset :

>>> df = pd.DataFrame(np.random.randn(6),index=dates,columns=list('A'))
>>> df.index = df.index + pd.DateOffset(days=15)
>>> df
                   A
2013-01-16  0.015282
2013-01-17  1.214255
2013-01-18  1.023534
2013-01-19  1.355001
2013-01-20  1.289749
2013-01-21  1.484291

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