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)
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