pandas.PeriodIndex.asfreq¶
- PeriodIndex.asfreq(freq=None, how='E')[source]¶
Convert the Period Array/Index to the specified frequency freq.
- Parameters
- freqstr
A frequency.
- howstr {‘E’, ‘S’}
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
- Period Array/Index
Constructed with the new frequency.
Examples
>>> pidx = pd.period_range('2010-01-01', '2015-01-01', freq='A') >>> pidx PeriodIndex(['2010', '2011', '2012', '2013', '2014', '2015'], dtype='period[A-DEC]', freq='A-DEC')
>>> pidx.asfreq('M') PeriodIndex(['2010-12', '2011-12', '2012-12', '2013-12', '2014-12', '2015-12'], dtype='period[M]', freq='M')
>>> pidx.asfreq('M', how='S') PeriodIndex(['2010-01', '2011-01', '2012-01', '2013-01', '2014-01', '2015-01'], dtype='period[M]', freq='M')