Python Pandas - 将 PeriodIndex 对象转换为 Timestamp 并设置频率
要将 PeriodIndex 对象转换为 Timestamp,请使用该方法。使用freq参数设置频率。PeriodIndex.to_timestamp()
首先,导入所需的库 -
import pandas as pd
创建一个 PeriodIndex 对象。PeriodIndex 是一个不可变的 ndarray,其中包含指示定期时间段的序数值。我们使用“freq”参数设置了频率 -
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")
显示 PeriodIndex 对象 -
print("PeriodIndex...\n", periodIndex)
将 PeriodIndex 转换为时间戳。我们使用“freq”参数设置了频率 -
print("\nPeriodIndex object to timestamp...\n", periodIndex.to_timestamp(freq='M'))
示例
以下是代码 -
import pandas as pd输出结果# 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 PeriodIndex to timestamp
# We have set the frequency using the "freq" parameter
print("\nPeriodIndex object to timestamp...\n", periodIndex.to_timestamp(freq='M'))
这将产生以下代码 -
PeriodIndex...PeriodIndex(['2021', '2019', '2020', '2022'], dtype='period[A-DEC]')
PeriodIndex frequency object...
<YearEnd: month=12>
PeriodIndex frequency object as a string...
A-DEC
PeriodIndex object to timestamp...
DatetimeIndex(['2021-01-31', '2019-01-31', '2020-01-31', '2022-01-31'], dtype='datetime64[ns]', freq=None)
以上是 Python Pandas - 将 PeriodIndex 对象转换为 Timestamp 并设置频率 的全部内容, 来源链接: utcz.com/z/335398.html