Python Pandas - 如何對具有微秒頻率的 DateTimeIndex 執行舍入操作


要用微秒頻率對 DateTimeIndex 執行舍入操作,請使用 DateTimeIndex.floor() 方法。對於微秒頻率,請使用取值為 ‘μs’freq 引數。

首先,匯入所需的庫 −

import pandas as pd

DateTimeIndex,頻率為秒,週期為 7。時區為澳大利亞/阿德萊德 −

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

微秒頻率的 DateTimeIndex 日期上的舍入操作。對於微秒頻率,我們使用了 'μs' −

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

示例

以下為程式碼 −

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'))

輸出

將會生成以下程式碼 −

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)

更新於: 2021 年 10 月 19 日

84 次瀏覽

開啟你的 職業生涯

透過完成課程獲得認證

立即開始
廣告
© . All rights reserved.