Python Pandas PeriodIndex - 將 PeriodArray 轉換為指定頻率
要將 PeriodArray 轉換為指定的頻率,請使用 periodIndex.asfreq() 方法。
首先,匯入所需的庫 -
import pandas as pd
建立一個 PeriodIndex 物件 -
periodIndex = pd.PeriodIndex(['2021-09-25 07:30:35', '2019-10-30 04:15:45', '2020-07-15 02:55:15', '2022-06-25 09:40:55'], freq="Y")
顯示 PeriodIndex 物件 -
print("PeriodIndex...\n", periodIndex)
轉換為指定的頻率。我們將頻率設定為了 asfreq() 的引數 -
print("\nConvert..\n", periodIndex.asfreq('M'))示例
以下是程式碼 -
import pandas as pd
# Create a PeriodIndex object
# PeriodIndex is an immutable ndarray holding ordinal values indicating regular periods in time
# We have set the frequency using the "freq" parameter
periodIndex = pd.PeriodIndex(['2021-09-25 07:30:35', '2019-10-30 04:15:45',
'2020-07-15 02:55:15', '2022-06-25 09:40:55'], freq="Y")
# Display PeriodIndex object
print("PeriodIndex...\n", periodIndex)
# Display PeriodIndex frequency
print("\nPeriodIndex frequency object...\n", periodIndex.freq)
# Display PeriodIndex frequency as string
print("\nPeriodIndex frequency object as a string...\n", periodIndex.freqstr)
# Convert to the specified frequency
# We have set the frequency as the parameter of the asfreq()
print("\nConvert..\n", periodIndex.asfreq('M'))輸出
將生成以下程式碼 -
PeriodIndex... PeriodIndex(['2021', '2019', '2020', '2022'], dtype='period[A-DEC]') PeriodIndex frequency object... <YearEnd: month=12> PeriodIndex frequency object as a string... A-DEC Convert.. PeriodIndex(['2021-12', '2019-12', '2020-12', '2022-12'], dtype='period[M]')
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