- Series.shift(periods=1, freq=None, axis=0, **kwds)¶
Shift index by desired number of periods with an optional time freq
periods : int
Number of periods to move, can be positive or negative
freq : DateOffset, timedelta, or time rule string, optional
Increment to use from datetools module or time rule (e.g. ‘EOM’). See Notes.
shifted : same type as caller
If freq is specified then the index values are shifted but the data is not realigned. That is, use freq if you would like to extend the index when shifting and preserve the original data.