[英]Round all index to 30 min in Pandas datetimeindex
I know about round, ceil, floor functions.我知道圆形,天花板,地板功能。
df.index.round("30min")
This rounds to the nearest 30 minute interval.这四舍五入到最接近的 30 分钟间隔。 What I want is that each is rounded to 30 minutes.我想要的是每个都四舍五入到 30 分钟。
In the case of.round 10:15 will be rounded to 10:30 and 10:45 to 11:00.在.round 的情况下,10:15 将四舍五入为 10:30,10:45 将四舍五入为 11:00。 I would want both rounded to 10:30.我希望两者都舍入到 10:30。
The datetime Index:日期时间索引:
DatetimeIndex(['2021-11-29 09:30:00', '2021-11-29 09:45:00',
'2021-11-29 10:00:00', '2021-11-29 10:15:00',
'2021-11-29 10:30:00', '2021-11-29 10:45:00',
'2021-11-29 11:00:00', '2021-11-29 11:15:00',
'2021-11-29 11:30:00', '2021-11-29 11:45:00',
...
'2021-12-27 13:30:00', '2021-12-27 13:45:00',
'2021-12-27 14:00:00', '2021-12-27 14:15:00',
'2021-12-27 14:30:00', '2021-12-27 14:45:00',
'2021-12-27 15:00:00', '2021-12-27 15:15:00',
'2021-12-27 15:30:00', '2021-12-27 15:45:00'],
dtype='datetime64[ns]', name='Datetime', length=520, freq=None)
Use DatetimeIndex.floor
by hour and add 30 minutes:按小时使用DatetimeIndex.floor
并加上 30 分钟:
df = pd.DataFrame(index=pd.DatetimeIndex(
['2021-11-29 09:30:00', '2021-11-29 09:45:00',
'2021-11-29 10:00:00', '2021-11-29 10:15:00',
'2021-11-29 10:30:00', '2021-11-29 10:45:00',
'2021-11-29 11:00:00', '2021-11-29 11:15:00',
'2021-11-29 11:30:00', '2021-11-29 11:45:00',
'2021-12-27 13:30:00', '2021-12-27 13:45:00',
'2021-12-27 14:00:00', '2021-12-27 14:15:00',
'2021-12-27 14:30:00', '2021-12-27 14:45:00',
'2021-12-27 15:00:00', '2021-12-27 15:15:00',
'2021-12-27 15:30:00', '2021-12-27 15:45:00']))
print (df.index.floor("1H") + pd.Timedelta('30min'))
DatetimeIndex(['2021-11-29 09:30:00', '2021-11-29 09:30:00',
'2021-11-29 10:30:00', '2021-11-29 10:30:00',
'2021-11-29 10:30:00', '2021-11-29 10:30:00',
'2021-11-29 11:30:00', '2021-11-29 11:30:00',
'2021-11-29 11:30:00', '2021-11-29 11:30:00',
'2021-12-27 13:30:00', '2021-12-27 13:30:00',
'2021-12-27 14:30:00', '2021-12-27 14:30:00',
'2021-12-27 14:30:00', '2021-12-27 14:30:00',
'2021-12-27 15:30:00', '2021-12-27 15:30:00',
'2021-12-27 15:30:00', '2021-12-27 15:30:00'],
dtype='datetime64[ns]', freq=None)
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