Python Pandas - 如何按分钟频率舍入 DateTimeIndex


若要按分钟频率舍入 DateTimeIndex,请使用 DateTimeIndex.round() 方法。对于分钟频率,请将 freq 参数与值 ‘T’ 搭配使用。

首先,导入必需的库 −

import pandas as pd

DatetimeIndex 的周期为 5,频率为 s(即秒)。时区为澳大利亚/阿德莱德 −

datetimeindex = pd.date_range('2021-09-29 07:00', periods=5, tz='Australia/Adelaide', freq='45s')

显示 DateTimeIndex −

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

使用分钟频率对 DateTimeIndex 日期执行舍入操作。对于分钟频率,我们使用了 'T −

print("\nPerforming round operation with minute frequency...\n",
datetimeindex.round(freq='T'))

示例

以下是代码 −

import pandas as pd

# DatetimeIndex with period 5 and frequency as s i.e. seconds
# timezone is Australia/Adelaide
datetimeindex = pd.date_range('2021-09-29 07:00', periods=5, tz='Australia/Adelaide', freq='45s')

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

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

# getting the minute
res = datetimeindex.minute

# display only the minute
print("\nThe minute from DateTimeIndex...\n", res)

# Round operation on DateTimeIndex date with minute frequency
# For minute frequency, we have used 'T'
print("\nPerforming round operation with minute frequency...\n",
datetimeindex.round(freq='T'))

输出

这会生成以下代码 −

DateTimeIndex...
DatetimeIndex(['2021-09-29 07:00:00+09:30', '2021-09-29 07:00:45+09:30',
'2021-09-29 07:01:30+09:30', '2021-09-29 07:02:15+09:30',
'2021-09-29 07:03:00+09:30'],
dtype='datetime64[ns, Australia/Adelaide]', freq='45S')
DateTimeIndex frequency...
<45 * Seconds>

The minute from DateTimeIndex...
Int64Index([0, 0, 1, 2, 3], dtype='int64')
Performing round operation with minute frequency...
DatetimeIndex(['2021-09-29 07:00:00+09:30', '2021-09-29 07:01:00+09:30',
'2021-09-29 07:02:00+09:30', '2021-09-29 07:02:00+09:30',
'2021-09-29 07:03:00+09:30'],
dtype='datetime64[ns, Australia/Adelaide]', freq=None)

更新于:18 年 10 月 2021 日

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