Python Pandas - 如何对具有微秒频率的 DateTimeIndex 执行舍入操作


要用微秒频率对 DateTimeIndex 执行舍入操作,请使用 DateTimeIndex.floor() 方法。对于微秒频率,请使用取值为 ‘μs’freq 参数。

首先,导入所需的库 −

import pandas as pd

DateTimeIndex,频率为秒,周期为 7。时区为澳大利亚/阿德莱德 −

datetimeindex = pd.date_range('2021-10-18 07:20:32.261811624', periods=5,
tz='Australia/Adelaide', freq='40S')

微秒频率的 DateTimeIndex 日期上的舍入操作。对于微秒频率,我们使用了 'μs' −

print("\nPerforming floor operation with microseconds frequency...\n",
datetimeindex.floor(freq='us'))

示例

以下为代码 −

import pandas as pd

# DatetimeIndex with period 7 and frequency as S i.e. seconds
# timezone is Australia/Adelaide
datetimeindex = pd.date_range('2021-10-18 07:20:32.261811624', periods=5,
tz='Australia/Adelaide', freq='40S')

# display DateTimeIndex
print("DateTimeIndex...\n", datetimeindex)

# display DateTimeIndex frequency
print("DateTimeIndex frequency...\n", datetimeindex.freq)

# Floor operation on DateTimeIndex date with microseconds frequency
# For microseconds frequency, we have used 'us'
print("\nPerforming floor operation with microseconds frequency...\n",
datetimeindex.floor(freq='us'))

输出

将会生成以下代码 −

DateTimeIndex...
DatetimeIndex(['2021-10-18 07:20:32.261811624+10:30',
'2021-10-18 07:21:12.261811624+10:30',
'2021-10-18 07:21:52.261811624+10:30',
'2021-10-18 07:22:32.261811624+10:30',
'2021-10-18 07:23:12.261811624+10:30'],
dtype='datetime64[ns, Australia/Adelaide]', freq='40S')
DateTimeIndex frequency...
<40 * Seconds>

Performing floor operation with microseconds frequency...
DatetimeIndex(['2021-10-18 07:20:32.261811+10:30',
'2021-10-18 07:21:12.261811+10:30',
'2021-10-18 07:21:52.261811+10:30',
'2021-10-18 07:22:32.261811+10:30',
'2021-10-18 07:23:12.261811+10:30'],
dtype='datetime64[ns, Australia/Adelaide]', freq=None)

更新于: 2021 年 10 月 19 日

84 次浏览

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