pandas.PeriodIndex.asfreq — pandas 2.2.3 documentation (original) (raw)

PeriodIndex.asfreq(freq=None, how='E')[source]#

Convert the PeriodArray to the specified frequency freq.

Equivalent to applying pandas.Period.asfreq() with the given arguments to each Period in this PeriodArray.

Parameters:

freqstr

A frequency.

howstr {‘E’, ‘S’}, default ‘E’

Whether the elements should be aligned to the end or start within pa period.

• ‘E’, ‘END’, or ‘FINISH’ for end,
• ‘S’, ‘START’, or ‘BEGIN’ for start.

January 31st (‘END’) vs. January 1st (‘START’) for example.

Returns:

PeriodArray

The transformed PeriodArray with the new frequency.

See also

pandas.arrays.PeriodArray.asfreq

Convert each Period in a PeriodArray to the given frequency.

Period.asfreq

Convert a Period object to the given frequency.

Examples

pidx = pd.period_range('2010-01-01', '2015-01-01', freq='Y') pidx PeriodIndex(['2010', '2011', '2012', '2013', '2014', '2015'], dtype='period[Y-DEC]')

pidx.asfreq('M') PeriodIndex(['2010-12', '2011-12', '2012-12', '2013-12', '2014-12', '2015-12'], dtype='period[M]')

pidx.asfreq('M', how='S') PeriodIndex(['2010-01', '2011-01', '2012-01', '2013-01', '2014-01', '2015-01'], dtype='period[M]')