Python Pandas - 返回特定時間段內 DateTimeIndex 中的值的索引位置
要返回特定時間段內 DateTimeIndex 中的值的索引位置,請使用 DateTimeIndex.indexer_between_time() 方法。
首先,匯入所需庫 −
import pandas as pd
使用 5 的週期和 T(即分鐘)建立 DateTimeIndex。時區為澳洲/阿德萊德 −
datetimeindex = pd.date_range('2021-10-30 02:30:50', periods=5, tz='Australia/Adelaide', freq='20T')
顯示 DateTimeIndex −
print("DateTimeIndex...\n", datetimeindex)顯示特定時間段內值的索引位置。“開始時間”設為“02:30:50”,“結束時間”為“03:20:50 −
print("\nIndex locations of values between particular time of day...\n",
datetimeindex.indexer_between_time('02:30:50','03:20:50'))示例
以下是程式碼 −
import pandas as pd
# DatetimeIndex with period 5 and frequency as T i.e. minutes
# The timezone is Australia/Adelaide
datetimeindex = pd.date_range('2021-10-30 02:30:50', periods=5, tz='Australia/Adelaide', freq='20T')
# display DateTimeIndex
print("DateTimeIndex...\n", datetimeindex)
# display DateTimeIndex frequency
print("\nDateTimeIndex frequency...\n", datetimeindex.freq)
# display index locations of values at particular time of day i.e. 03:10:50 here
print("\nIndex locations of values at particular time of day...\n",
datetimeindex.indexer_at_time('2021-10-30 03:10:50'))
# display index locations of values between particular time of day
# The "start_time" is set '02:30:50' and "end_time" '03:20:50'
print("\nIndex locations of values between particular time of day...\n",
datetimeindex.indexer_between_time('02:30:50','03:20:50'))輸出
這將生成以下程式碼 −
DateTimeIndex... DatetimeIndex(['2021-10-30 02:30:50+10:30', '2021-10-30 02:50:50+10:30', '2021-10-30 03:10:50+10:30', '2021-10-30 03:30:50+10:30', '2021-10-30 03:50:50+10:30'], dtype='datetime64[ns, Australia/Adelaide]', freq='20T') DateTimeIndex frequency... <20 * Minutes> Index locations of values at particular time of day... [2] Index locations of values between particular time of day... [0 1 2]
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