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Series.asfreq(freq, method=None, how=None, normalize=False)[source]

Convert TimeSeries to specified frequency.

Optionally provide filling method to pad/backfill missing values.


freq : DateOffset object, or string

method : {‘backfill’/’bfill’, ‘pad’/’ffill’}, default None

Method to use for filling holes in reindexed Series (note this does not fill NaNs that already were present):

  • ‘pad’ / ‘ffill’: propagate last valid observation forward to next valid
  • ‘backfill’ / ‘bfill’: use NEXT valid observation to fill

how : {‘start’, ‘end’}, default end

For PeriodIndex only, see PeriodIndex.asfreq

normalize : bool, default False

Whether to reset output index to midnight


converted : type of caller


To learn more about the frequency strings, please see this link.

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